Firefly Mobile C100 Dual-Band CDMA Phone User Manual Firefly PG D2

Firefly Mobile Inc. Dual-Band CDMA Phone Firefly PG D2

Users Manual

User Guide for Parents
TABLE OF CONTENTSSAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Network Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Charger and Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1MEET FIREFLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2PREPARE FIREFLY FOR USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Install a SIM Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Charge the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Power On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5FIREFLY MENUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6Menu Choices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Using the Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9SET UP FIREFLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Set the Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Set Up the Call Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Load Call Key Numbers from the SIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Call Screening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14CUSTOMIZE FIREFLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Set the Ring Tones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Select Display Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Select an Animation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Change the Charger Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16USING FIREFLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Make a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Make an Emergency Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Answer a Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Answer a Call with a Waiting Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18Adjust the Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19View the Missed Calls List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19View the Total Call Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19Firefly Lights and Fireworks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Attach the Backpack Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20Firefly-PG_D2 11/22/04 5:11 PM Page iii
HELP YOUR CHILD USE FIREFLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21MAINTENANCE AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . .21Clean Firefly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Use the Manual Reset Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21FIREFLY ONE-YEAR LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . .22FCC NOTICE AND SAR STATEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25U.S. FOOD AND DRUG ADMINISTRATION CONSUMER UPDATE ON MOBILE PHONES . . . . . . . . . . . . . . . . . . . . . . . . . . .27Copyright ©2005 Firefly Mobile, Inc.Firefly is a registered trademark of Firefly Mobile, Inc.For more information visit www.fireflymobile.com.Screen images are simulated. Actual screen images mayvary between service providers.Printed in USA84-0001-00Firefly-PG_D2 11/22/04 5:11 PM Page iv
SAFETY INFORMATIONRead and follow these guidelines. Not following these guidelines may be dangerous orillegal. Read the complete guide for more information.Power up (turn on) safely. Use this phone only where wireless phones arepermitted.Interference. All wireless phones may be susceptible to interference, whichcould affect performance.Turn off in hospitals. Follow any restrictions. Wireless devices can causeinterference with medical equipment.Turn off in aircraft. Wireless devices can cause interference in aircraft.Qualified service. Only qualified technicians may repair this product.Water resistance. This phone is not waterproof. Keep it dry.Emergency calls. Make sure the phone is turned on and in service. Pressand hold the emergency call button until Emergency Call appears in thedisplay. Press to complete the call. When using the features in this device, obey all laws and respect privacy andlegitimate rights of others.Network ServicesTo use the Firefly handset, you must obtain service from a wireless service provider.Your service provider may provide additional instructions for using network services onthis phone. Some networks may have limitations that affect how you can use wirelessservices. Charger and EnhancementsThis handset uses an internal, rechargeable lithium-ion battery. When you disconnecta power cord, grasp and pull the plug, not the cord. For availability of approvedchargers and enhancements, please check with your dealer.Warning! Use only chargers and accessories approved by the manufacturer foruse with Firefly. Use of any other types will invalidate the warranty and may bedangerous.1Firefly-PG_D2 11/22/04 5:11 PM Page 1
MEET FIREFLYYour new Firefly wireless phone is designed for kids. It is easy to use. Just press acouple of buttons to place a call. There is no need to remember numbers or dial.Firefly's special Phone Book makes this possible. It can hold up to 22 pre-programmed numbers. Use the parental control options to limit incoming andoutgoing calls to the numbers in the Phone Book.1Earpiece. Hold to ear when using Firefly.2Display. View status and menu information.3Emergency call button. Press and hold toactivate the emergency call function.Emergency Call appears on the display.4End key. Press to end a call. Press and holdto turn Firefly on or off.5Phone Book call key. Press to view and callup to 20 pre-programmed numbers.6Dad call key. Press to call a pre-programmed number.7Mouthpiece. Hold near mouth when usingFirefly.8Mom call key. Press to call a pre-programmed number.9Send key. Press to answer or make a call.Press and hold to see the menus.10 Volume down button. Press to decreaseearpiece or ring volume.11 Firefly Fireworks™ button. Press to start theFireworks.12 Volume up button. Press to increase earpieceor ring volume.13 Charger port. For charger cable.14 Earpiece port. For accessory earpiece cable.15 Accessory Hook. Use to attach Fireflyaccessories.1211108765432191315 142Firefly-PG_D2 11/22/04 5:11 PM Page 2
PREPARE FIREFLY FOR USEFirefly requires a SIM card and a charged battery for operation.Install a SIM CardYour Firefly may already have a SIM card installed. If not, you must install a SIM cardbefore setting up your Firefly. The SIM card (provided by your network serviceprovider) contains the phone number for your Firefly and provides access to networkservice options. Note: Contact your network service provider if you have problems with the SIM cardor questions about your service.1. Push up on the release buttonat the top of the rear cover.Start at the top and gently pulloff the rear cover.2. Remove the front coverby pressing on the andkeys while holding the frontcover.3. Slide the SIM card under themetal clip. Make sure the cutcorner is lower left and the goldcontacts of the SIM card facedown.4. Replace the front cover. Movethe keypad into place, ifneeded.5. Replace the rear cover andgently press the front and rearcovers together.31234 5Firefly-PG_D2 11/22/04 5:11 PM Page 3
Charge the BatteryIt will take about 2 hours to charge the internal battery for the first time. Whilecharging, the tail lights flash and Charging appears on the display. The battery icon willindicate that Firefly is charging.To charge the battery:1. Connect the charger to a standard ACwall outlet.2. Plug the charger cable into the Fireflybattery port.Note: After the initial charge, recharge thebattery when the battery icon in the displayreads low. Warning! Always use the charger supplied with Firefly or one approved by themanufacturer. Other chargers may damage Firefly and will void the warranty.4ChargercableFirefly-PG_D2 11/22/04 5:11 PM Page 4
GETTING STARTEDAfter the SIM card is installed and the battery is charged, you are ready to begin thesetup process.Power On and OffTo turn on Firefly, press and hold for severalseconds. The lights go on and the displayactivates. Firefly will attempt to locate the wirelessservice. Note: If Firefly is not in a service area, No Networkappears on the display. To turn off Firefly, press and hold for severalseconds. The display goes blank and the lights gooff. Display The display area is activated when Firefly is on and provides information about:• Your wireless service.• Signal strength.• Battery status.• Name and number of incoming/outgoing calls.• Menu options and selections.1. Indicates signal strength.Strong signalWeak signal2. Indicates battery strength.Full chargePartial chargeLow charge, recharge battery3. Text area.5Firefly8:00 SAT JAN 17132Press andhold to turnFirefly on oroff.Firefly-PG_D2 11/22/04 5:11 PM Page 5
FIREFLY MENUSFirefly uses menus to customize the Firefly and make it more fun for your child to use.For example, using the menus you or your child can:• Change the Fireworks animation. • Select display colors and animations.• Select a language for the display text.In addition, several PIN-protected, parental control menus allow you to manageincoming and outgoing calls for your child.To prepare Firefly for use, complete the set-up tasks described in this section. Gray = PIN-protected menu6Firefly-PG_D2 11/22/04 5:11 PM Page 6
Each menu controls a special operation or feature.MENU OPERATION/FEATUREEnter PIN Enter your PIN to access the PIN-protected menus.*Change PIN Set up a unique PIN. *Keys Assign names and telephone numbers to the Call Keys.*Call Screening Turn Call Screening on or off.*My Number See the phone number of your Firefly.Missed Calls See a list of unanswered calls.Ringers Select and assign special ring tones for each Call Key. Display Colors Change the background color of the display. Options Set/select the following options:Ring Volume Set the default ring volume.Animation Select the animation option for the display.Time/Date Set the time and date.Language Select the language used for display messages.Charger Light Turn the tail lights on or off when charging thebattery.Default Settings Restore Firefly to its original factory settings.Call Time View the total cumulative call time of Firefly.Exit Return to normal operation.*Indicates a PIN-protected menu.7Firefly-PG_D2 11/22/04 5:11 PM Page 7
Menu ChoicesIn the menus, the , , and keys are used to select the menu choices on thebottom line of the display. Press the menu key below the menu choice to performthe task.MENU CHOICE PRESS THE MENU KEY TO:<– Scroll to previous item.–> Scroll to next item.BACK Return to previous menu.CANCEL Cancel the current selection.COLOR View the next display color.EDIT Change/modify time, date, name, or number.EXIT Close the menus and return to normal operation.KEY Select the next Call Key.LOAD Load a name and number from the SIM card.MORE View additional options.NEXT View next screen or menu.NO Reject current setting/selection.OK Accept current or selected setting/selection.OPTION View the next Option menu.RING Play the next ring tone choice.SAVE Apply current setting/selection.SWITCH Switch between options.YES Accept current setting/selection.Note: Not all menu choices are available in each menu. 8Time/DateBACK OK OPTIONMenu Name or Menu OptionMenu ChoicesFirefly-PG_D2 11/22/04 5:11 PM Page 8
Using the MenusWhen you access the Firefly menus, you will be promptedto enter a 4-digit PIN. If you skip the PIN, you will see onlythe menus that are not PIN-protected. If you enter a PIN,you will see all the menus.To access the menus:1. Press and hold until you see Enter PIN. 2. Press SKIP to access the menus that are not PIN-protected.3. Use BACK and NEXT to move through the menus. UseOK to select options. 4. To exit the menus, continue to press NEXT until yousee the Exit screen, then press EXIT.To access the PIN-protected menus:1. Press and hold until you see Enter PIN.2. Press ENTER.3. Enter your PIN. {default PIN = 1 2 3 4} a. Press –> to scroll to the first number and pressOK. An asterisk (*) appears on the top line.b. Scroll to the next number and press OK. Repeatuntil you have entered the PIN. c. Scroll to Done and press OK. If the PIN isaccepted, you will see Change PIN.4. Press YES to change the PIN number. (Press NO togo to the next menu without changing the PIN.)a. Scroll to the number and press OK. An asterisk (*)appears on the top line.b. Scroll to the next number and press OK. Repeatuntil you have entered the PIN. Make sure thereare 4 asterisks (****) on the top line.c. Scroll to Done and press OK. Saved indicates thenew PIN was accepted. Note: If you change the default PIN, remember to save a copy of the newPIN in a secure place.5. Press YES to change the PIN again or press NO to move to the next menu.6. Use BACK and NEXT to move through the menus. Use OK to select options. 9Done Del 0 1 2<– OK –>Enter PINENTER SKIP****Done Del 0 1 2<– OK –>Firefly-PG_D2 11/22/04 5:11 PM Page 9
SET UP FIREFLYBefore using Firefly, you should:• Set the time and date.• Set up the Call Keys and Phone Book.• Turn Call Screening ON (optional) .Note: When Call Screening is ON, Firefly only accepts calls from numbers in thePhone Book. When Call Screening is OFF, Firefly accepts all incoming calls.Set the Time and Date1. Scroll through the menus until you see Options.Press OK.2. Press OPTION until you see Time/Date. Press OK.3. Press EDIT to see the time options:a. Scroll to the current hour. Press OK.b. Scroll to the current minute. Press OK.c. Scroll to am or pm and press OK. Scroll to Doneand press OK. d. Check the time. Press EDIT if you need to changethe time.e. Press OK to save the time.4. Press EDIT to see the date options:a. Press <– and –> to scroll to the current year, thenpress OK.b. Scroll to the current month. Press OK.c. Scroll to today's date. Press OK.d. Scroll to Done. Press OK. e. Check the date. Press EDIT if you need to changethe date.f. Press OK to save the date.10Date:2004/12/04BACK OK EDITOptionsBACK OK NEXTTime/DateBACK OK OPTIONFirefly-PG_D2 11/22/04 5:11 PM Page 10
Set Up the Call KeysThere are 3 Call Keys:• Two speed dial keys, and . Each calls a singlenumber. By default, these keys are called Mom and Dad.• The key is used to access up to 20 names andnumbers. During set-up, the names and numbers areentered individually or downloaded from a pre-programmedSIM card.Use the PIN-protected Keys menu to change the names and numbers assigned to thethree Call Keys.To set up the and Call Keys:1. Press and hold to access the menus. Enter your PIN.2. Scroll through the menus to Keys. Press OK. A CallKey name appears on the display.3. Press OK to set up this Call Key or press KEY until yousee the name of the Call Key you want. Note: If your SIM card contains programmednumbers, you may load names/numbers directly fromthe SIM. If the SIM does not contain numbers, pressEDIT. See Load Call Key Numbers from the SIM for more information.a. Press <– and –> to scroll to the first digit of the number, then press OK. Thedigit appears on the top line. b. Scroll to the next digit and press OK. Repeat until the entire number is onthe top line.Tip: Scroll to Del and press OK to delete a digit.c. Scroll to Done and press OK to save the number and display the name (ifany) assigned to this key.4. Now the name assigned to the Call Key is displayed. If needed, press EDIT tochange the name.a. Press <– and –> to scroll to the first letter, then press OK. The name appearson the top line.Tip: Scroll to Del and press OK to remove a letter.b. Scroll to the next letter and press OK. Repeat until the entire name is on thetop line.c. Scroll to Done and press OK to save the name and return to the Keys menu.5. Repeat steps 3 and 4 to set-up the key.11KeysBACK OK NEXTFirefly-PG_D2 11/22/04 5:11 PM Page 11
To set up the Phone Book key:The Firefly Phone Book can hold a maximum of 20 names and numbers. Setting upthe names and numbers in the Phone Book is similar to setting up the Mom andDad keys.Use the PIN-protected Keys menu to add, change, and delete names and numbersin the Phone Book.•Add. Enter names/numbers.•Edit. Modify names/numbers already in the Phone Book.•Delete. Remove names and numbers from the Phone Book.To add a name/number to the Phone Book:1. Press and hold to access the menus. Enter your PIN.2. Scroll to Keys and press OK. Press KEY until you seePhone Book. Press OK.3. Press OPTION until you see Add, then press OK.a. Press EDIT.b. Use <– and –> to scroll to a letter and press OK toput it on the top line.Tip: Scroll to Del and press OK to delete the lastletter.c. Scroll to the next letter and press OK. Repeat until the entire name is on thetop line of the display.d. Scroll to Done and press OK. The number will appear on the display. PressEDIT to change the number.f. Scroll to the desired digit and press OK to put the digit on the top line.g. Scroll to the next digit and press OK. Repeat until the entire number is onthe top line.h. Scroll to Done and press OK.4. Press OK to enter another name/number and repeat step 3.5. Press BACK to return to the Keys menu.12Phone BookBACK OK KEYFirefly-PG_D2 11/22/04 5:11 PM Page 12
To edit the Phone Book:1. Press and hold to access the menus. Enter your PIN. 2. Scroll to Keys and press OK. Press KEY until you see Phone Book and press OK.3. Press OPTION until you see Edit, then press OK.a. Press EDIT to change the name.b. Use <– and –> to scroll to a letter and press OK toput it on the top line.Tip: Scroll to Del and press OK to delete thelast letter.c. Scroll to the next letter and press OK. Repeat untilthe entire name is on the top line of the display.d. Scroll to Done and press OK. The number will appear on the display. PressEDIT to change the number.f. Scroll to the desired digit and press OK to put the digit on the top line.g. Scroll to the next digit and press OK. Repeat until the entire number is onthe top line.h. Scroll to Done and press OK.4. Press OK to enter another name/number and repeat step 3.5. Press BACK to return to the Keys menu.To delete a name/number from the Phone Book:1. Access the menus and enter your PIN.2. Scroll to Keys and press OK. Press KEY until you seePhone Book and press OK.3. Press OPTION until you see Delete. Press OK.4. Use –> to scroll to the name/number you want todelete.5. Press DEL to delete the Phone Book entry. Press YESto confirm that you want to delete this Phone Book entry.6. Press BACK to return to the Keys menu.13NameNumberBACK EDIT –>NameNumberBACK DEL –>Firefly-PG_D2 11/22/04 5:11 PM Page 13
Load Call Key Numbers from the SIMNote: Your SIM card can be pre-programmed with names and numbers fromany GSM cellular handset. These names and numbers can then be loaded ontoyour Firefly.1. Press and hold to access the menus. Enter your PIN.2. Scroll through the menus to Keys. Press OK. 3. Press KEY to scroll to the desired Call Key and press OK. 4. Press LOAD.a. Press –> to scroll through the names and numbers on the SIM.b. Press OK when you see the desired name and number. c. Press OK to save the name/number.Tip: Press EDIT if you need to change the number.d. Press OK again to confirm the name/number and finally to return to Keys.5. Repeat steps 3 and 4 to load another name and number.Call ScreeningWhen Call Screening is OFF, Firefly will accept all incoming calls. When Call Screeningis ON, Firefly will accept calls only from the names/numbers assigned to the Call Keysand in the Phone Book. The default setting for Call Screening is OFF. After you activate the Call Screening option, test it to make sure it is working properlybefore giving Firefly to your child.To turn Call Screening on or off:1. Press and hold to access the menus. Enter your PIN.2. Scroll through the menus to Call Screening. Press OK.3. Press SWITCH to toggle between Call Screen ON and Call Screen OFF.4. Press OK to accept the setting.To test Call Screening, call Firefly from two different phones:• Call from a phone that is listed in the Firefly Phone Book. Firefly should ring.• Call from a phone that is not in the Phone Book. Firefly should not ring.If Call Screening is not working:• Check the Phone Book to make sure the number of the "approved phone" is inthe Phone Book. • Check the Call Screening menu to make sure the Call Screening is ON.14Firefly-PG_D2 11/22/04 5:11 PM Page 14
CUSTOMIZE FIREFLYYou have finished the basic setup and Firefly is ready to use. However, you may alsowant to set/select other features, including: • Set ring tones for each Call Key.• Set display colors for each Call Key.• Select an animation that will run during the Fireworks.Set the Ring TonesTo assign a special ring tone to a Call Key:1. Scroll through the menus until you see Ringers.Press OK.2. Press KEY until you see the Call Key you want.Press OK.3. Listen to the first ring tone. Press RING to hearanother ring tone. Press OK to assign the ring tone tothe Call Key. Saved appears on the display and youwill return to the Ringers menu.4. Repeat steps 2 and 3 to assign a ring tone to eachCall Key.Select Display ColorsTo assign a background display color to a Call Key:1. Scroll through the menus until you see Display Colors.Press OK.2. Press KEY until you see the Call Key you want.Press OK.3. Look at the display color. Press COLOR to see morechoices. Press OK to assign the color to the Call key.Saved appears on the Display and you will return tothe Display Colors menu.4. Repeat to assign a display color to another key.15RingersBACK OK NEXTGenieBACK OK RINGDisplay ColorsBACK OK NEXTTurfBACK OK COLORFirefly-PG_D2 11/22/04 5:11 PM Page 15
Select an AnimationThe animation you select will play during the Fireworks.To select an animation:1. Scroll through the menus until you see Options.Press OK.2. Press OPTION until you see Animation. Press OK.3. Press MORE until you see the animation name youwant, then press OK. Saved will appear on thedisplay and you will return to the Animation menu.Change the Charger LightsTo turn the tail lights on or off while the battery is charging:1. Scroll through the menus until you see Options. Press OK.2. Press OPTION until you see Charger Light. Press OK. 3. Press SWITCH to turn the lights on or off, then press OK to save the setting.16SoccerBACK OK MOREFirefly-PG_D2 11/22/04 5:11 PM Page 16
USING FIREFLYNow that you have set-up and customized Firefly, it's time to use it for the first time.Make a CallTo make a call using or :1. Press or .2. Check the name on the display.Note: If it is not correct, you need to reprogramthis key.3. Press to place the call.4. Press to end the call.To make a call using thePhone Book:1. Press .2. Use <– and –> to scroll to the name/number you want to call. Press OK. The name will appear on the display.3. Press to place the call.4. Press to end the call.Make an Emergency Call1. Press and hold the emergency button for 3 seconds.Release the button when you see Emergency Call onthe display.Note: Do NOT complete the call unless this is anactual emergency.2. Press to complete the call.3. Press to end the call.1713214323124Firefly-PG_D2 11/22/04 5:11 PM Page 17
Answer a Call1. Check the name and/or number on the display.2. Press to answer the call.3. Press to end the call.Answer a Call Waiting CallIf Firefly is in use and another call comes in, use this procedure to put the first call onhold, answer the second call, and switch between callers.1. Press to answer the new call. Firefly will put the first caller on hold.2. Check the display and press SWAP to switch between calls.3. Press to end the call. The call on hold will become active. Press again toend the active call.18132IncomingGRANDMAHI BYEGRANDMASWAP 00:24 BYEFirefly-PG_D2 11/22/04 5:11 PM Page 18
Adjust the Volume To adjust the volume during a call:• Press the Volume up button to increase thevolume.• Press the Volume down button to decrease thevolume.To adjust the volume of the ring:The ring can only be adjusted when Firefly is not incall mode.• Press the Volume up button to increase thevolume of the ring tone.• Press the Volume down button to decrease thevolume of the ring tone.View the Missed Calls ListOnly calls that are missed while Firefly is powered on will appear on theMissed Calls list.To see a list of unanswered calls:1. Scroll through the menus to Missed Calls. Press OK.2. Press –> to scroll through the list. Press BACK to return to the menus.View the Total Call TimeTo see the total call time for your Firefly:1. Scroll through the menus until you see Options. Press OK.2. Press OPTION until you see Call Time. Press OK. The call time format ishh:mm:ss.3. Press OK.19Volume upVolume downFirefly-PG_D2 11/22/04 5:11 PM Page 19
Firefly Lights and FireworksFirefly lights up when it is turned on and when the Fireworks button is pressed. Thelights go off after 15 seconds or when Firefly is turned off.• Display background color changes during theFireworks. It is red when the Emergency buttonis pressed. • Call Keys lights glow when pressed and whenreceiving calls. • Tail lights flash when the battery is charging andperiodically when Firefly is on.Press the Fireworks button to see a 30-secondFireworks show. All the lights flash, the animationruns, and the display changes colors. TheFireworks also play periodically whenever Fireflyis powered on.Your child can change the light color for each callkey, select an animation for the display, andactivate/deactivate the Fireworks option. Note: See Customize Firefly for more information.Attach the Backpack ClipThe backpack clip is a convenient accessory that your child can use to clip Firefly to abackpack or other item.1. Detach the 2-piece plastic clip.2. Thread the string loop through theaccessory hook (located under the batterycharger port).3. Insert the plastic clip through the loop andpull it tight to secure.4. Reattach the 2-piece plastic clip.5. Use the backpack clip to secure Firefly toa backpack, belt loop, or similar item.20Press tostart theFireworks.plastic clipbackpackclipStringloopFirefly-PG_D2 11/22/04 5:11 PM Page 20
HELP YOUR CHILD USE FIREFLYNow it's time to show your child how to use and take care of Firefly. Depending on the age of your child, you may want to read the Firefly User Guide withyour child. We recommend you show your child how to use Firefly properly and allowhim/her to demonstrate how to answer a call and place a call. Explain how to take care of Firefly and make arrangements for charging the battery ona regular basis. Depending on the age of the child, you may want to make sure anadult is responsible for charging the battery. MAINTENANCE AND TROUBLESHOOTINGClean FireflyTo clean Firefly, use a soft cloth lightly moistened with water. • Firefly is NOT waterproof. Keep Firefly away from water and rain. • Do not use strong cleaning solutions or abrasive products as they may damagethe plastic. Use the Manual Reset OptionIf the Firefly display "freezes" or the keys won't work:• Make sure a key isn't stuck in the keypad. If it is, gently move the key to free it.• You may need to reset the system using the manual override option.1. Remove the rear and front covers. See Install aSIM Card for instructions.2. Use your fingernail to press the small reset keylocated on the left side of the circuit board underthe keypad. This should cause Firefly to turn offimmediately.3. Replace the covers.4. Press and hold to turn on Firefly. 21Reset buttonFirefly-PG_D2 11/22/04 5:11 PM Page 21
FIREFLY ONE-YEAR LIMITED WARRANTYFirefly Mobile, Inc. ("Firefly") warrants that this cellular phone ("Product") will be freefrom defects in material and workmanship that result in Product failure during normalusage for ONE (1) YEAR from the date of purchase, according to the following termsand conditions:1. The limited warranty extends only to the original purchaser ("You" or"Consumer") of the Product and may not be assigned or transferred to anysubsequent purchaser or user. The limited warranty extends only to theConsumer who purchases the Product in the country for its intended sale.2. Upon request from Firefly, You must prove the date of the original purchase ofthe Product by a dated bill of sale or dated itemized receipt.3. During the limited warranty period, Firefly will repair or replace the Product, asFirefly determines, if its limited warranty applies. Firefly will be responsible forparts and labor to repair or replace the Product or defective parts of theProduct.4. The limited warranty does NOT cover defects in appearance, cosmetic,decorative or structural items, including framing, and any parts that do notaffect the Product functions.5. You shall bear the cost of shipping the Product to Firefly or to Firefly'sauthorized return center. Firefly shall bear the cost of shipping the Productback to You after completion of service, provided that repairs were required tobe performed under this limited warranty.6. Firefly's limited warranty does NOT apply if any of the following circumstancesoccurs:a. The Product has been subjected to abnormal use or conditions, improperstorage, exposure to moisture or dampness, unauthorized modifications,unauthorized connections, unauthorized repairs, misuse, neglect, abuse,accident, alteration, improper installation, or other acts that are not thefault of Firefly. This includes damage caused by shipping.b. The Product has been damaged by external causes such as liquid, water,collision with an object, or from fire, flooding, sand, dirt, windstorm,lightning, or exposure to weather conditions; battery leakage; theft; blownfuse or improper use of any electrical source; computer or Internet viruses,bugs, worms, Trojan Horses, cancelbots; or connection to products notrecommended for interconnection by Firefly.c. Defects or damages are caused by physical damage to the surface of theProduct, including scratches or cracks in or to the outside housing or theLCD display.22Firefly-PG_D2 11/22/04 5:11 PM Page 22
d. You did not advise Firefly in writing of the alleged defects or malfunction ofthe Product within fourteen (14) days after the expiration of the warrantyperiod.e. The Product serial number plate or the accessory data code has beenremoved, defaced, or altered.f. The defect or damage was caused by the defective function of the cellularsystem or by inadequate signal reception.7. If damage or a defect develops during the limited warranty period, You musttake the following step-by-step procedure:a. Return the Product to the place of purchase for repair or replacement.You must copy to another device and delete from the Product anysensitive data that You have stored in the Product prior to sending theProduct for repair or replacement.b. If return to the place of purchase is not convenient due to distance (morethan 50 miles), You may contact the Customer Service Department at1-877-727-4448 for shipping instructions.c. Ship the Product prepaid and insured at Your expense. Shippingexpenses and expenses related to removing the Product from aninstallation are not covered under Firefly's limited warranty.d. If the Product is covered by Firefly's limited warranty, Firefly will return therepaired or replaced Product to You at Firefly's expense. You areresponsible for any expenses related to reinstallation of the Product.e. Firefly will repair or authorize the repair of the Product under the limitedwarranty within 30 days of receipt of the Product. If Firefly cannot performrepairs covered under this warranty within 30 days, Firefly will provide areplacement Product or refund the purchase price.f. If the Product is returned more than fourteen (14) days after the expirationof the limited warranty period, or if the Product is returned during thelimited warranty period, but the problem with the Product is not coveredunder the terms and conditions of Firefly's limited warranty, Firefly will sonotify You and provide an estimate (using Firefly's standard rates) of thecharges You must pay to repair the Product, including return shippingcharges. If You refuse the estimate Firefly will return the Product freightcollect.8. A repaired Product may consist of used components, some of which havebeen reprocessed. All used components comply with Product performanceand reliability specifications.9. Returning a Product for warranty repair or replacement will not extend theoriginal warranty period.23Firefly-PG_D2 11/22/04 5:11 PM Page 23
10. Firefly's limit of liability under the warranty shall be the actual cash value of theProduct at the time the Consumer returns the Product for repair. The cashvalue shall be determined by the price paid by the Consumer for the Productless a reasonable amount for usage. Firefly shall not be liable for any otherlosses or damages.11. The remedies set forth in this limited warranty are Your exclusive remedies forbreach of warranty.12. THE FOREGOING LIMITED WARRANTY IS THE CONSUMER'S SOLE AND EXCLUSIVEREMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR APARTICULAR PURPOSE OR USE. IN NO EVENT SHALL FIREFLY BE LIABLE FOR SPECIAL, INCIDENTAL,CONSEQUENTIAL OR PUNITIVE DAMAGES, INCLUDING LOSS OF ANTICIPATEDBENEFITS OR PROFITS, LOSS OF SAVINGS OR REVENUE, LOSS OF USE OF THEPRODUCT OR ANY ASSOCIATED EQUIPMENT, LOSS OF DATA, COST OF CAPITAL,COST OF ANY SUBSTITUTE EQUIPMENT OR FACILITIES, DOWNTIME, THE CLAIMSOF ANY THIRD PARTIES, INCLUDING CUSTOMERS, AND INJURY TO PROPERTY,RESULTING FROM THE PURCHASE OR USE OF THE PRODUCT OR ARISING FROMBREACH OF THE WARRANTY, BREACH OF CONTRACT, NEGLIGENCE, STRICTLIABILITY, OR ANY OTHER LEGAL OR EQUITABLE THEORY, EVEN IF FIREFLY KNEWOF THE LIKELIHOOD OF SUCH DAMAGES. FIREFLY SHALL NOT BE LIABLE FORDELAY IN RENDERING SERVICE UNDER THE LIMITED WARRANTY, OR LOSS OF USEDURING THE PERIOD THAT THE PRODUCT IS BEING REPAIRED OR FOR LOSS OFDATA STORED IN THE PRODUCT.13. Disclaimers of implied warranties are not enforceable in some jurisdictions,and some jurisdictions do not allow limitation of how long an implied warrantylasts, so the one year warranty limitation may not apply to You. This limitedwarranty gives You specific legal rights and You may also have other rights thatvary from jurisdiction to jurisdiction.14. This limited warranty is the entire warranty between Firefly and the Consumer,and supersedes all prior and contemporaneous agreements or understandings,oral or written, and all communications relating to the Product. Norepresentative of Firefly or any third party seller of Firefly PRODUCTS maymodify these terms, either orally or in writing.24Firefly-PG_D2 11/22/04 5:11 PM Page 24
FCC NOTICE AND SAR STATEMENTThis device complies with part 15 of the FCC Rules. Operation is subject to thefollowing two conditions: (1) This device may not cause harmful interference, and (2)this device must accept any interference received, including interference that maycause undesired operation.Any changes or modifications not expressly approved by Firefly Mobile, Inc. will voidthe user's authority to operate the equipment. Use only Firefly approved chargers.Note: This equipment has been tested and found to comply with the limits for a ClassB digital device, pursuant to part 15 of the FCC Rules. These limits are designed toprovide reasonable protection against harmful interference in a residential installation.This equipment generates, uses and can radiate radio frequency energy and if notinstalled and used in accordance with the instructions, may cause harmfulinterference to radio communications. However, there is no guarantee thatinterference will not occur in a particular installation. If this equipment does causeharmful interference to radio or television reception, which can be determined byturning the equipment off and on, the user is encouraged to try to correct theinterference by one or more of the following measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and receiver.• Connect the equipment into an outlet on a circuit different from that to whichthe receiver is connected.• Consult the dealer or an experienced radio/TV technician for help.THIS PHONE MODEL HAS BEEN CERTIFIED TO BE IN COMPLIANCE WITH THEGOVERNMENT'S REQUIREMENTS FOR EXPOSURE TO RADIO WAVES.Before a phone model is available to sale to the public, it must be tested and certifiedthat it does not exceed government limits for exposure to radio frequency (RF) energy.Specific Absorption Rate (SAR) is a value that corresponds to the relative amount ofRF energy absorbed by the user of a wireless phone. The Federal CommunicationsCommission of the United States government and Health Canada set SAR limits. Thelimits include a safety margin designed to assure the safety of all persons, regardlessof age and health. The maximum allowed SAR value set by the FCC is 1.6 W/kg. Testsfor SAR values are conducted using FCC approved operating positions at the highestpossible power levels. Although the SAR is determined at the highest certified powerlevel, the actual SAR level of the phone while operating is likely well below themaximum value. 25Firefly-PG_D2 11/22/04 5:11 PM Page 25
The highest SAR values as reported to the FCC for this model phone are in fullcompliance with FCC limits. This SAR compliance is limited to the specific accessoriesshipped with this phone. For body worn operation this device was tested with 1.5cmseparation to the body. Third party belt-clips, holsters, and similar accessoriescontaining metallic components should not be used. For more information about RF exposure, visit the FCC website at www.fcc.gov.Additional information on Specific Absorption Rates (SAR) can be found on theCellular Telecommunications & Internet Association (CTIA) website: http://www.ctia.org/wireless_consumers/health_and_safety/index.cfmor the Canadian Wireless Telecommunications Association (CWTA) website: http://www.cwta.ca26Firefly-PG_D2 11/22/04 5:11 PM Page 26
U.S. FOOD AND DRUG ADMINISTRATIONCONSUMER UPDATE ON MOBILE PHONESDo wireless phones pose a health hazard?The available scientific evidence does not show that any health problems areassociated with using wireless phones. There is no proof, however, that wirelessphones are absolutely safe. Wireless phones emit low levels of radiofrequency energy(RF) in the microwave range while being used. They also emit very low levels of RFwhen in the stand-by mode. Whereas high levels of RF can produce health effects (byheating tissue), exposure to low level RF that does not produce heating effects causesno known adverse health effects. Many studies of low level RF exposures have notfound any biological effects. Some studies have suggested that some biological effectsmay occur, but such findings have not been confirmed by additional research. Insome cases, other researchers have had difficulty in reproducing those studies, or indetermining the reasons for inconsistent results.What is the FDA's role concerning the safety of wireless phones?Under the law, FDA does not review the safety of radiation-emitting consumerproducts such as wireless phones before they can be sold, as it does with new drugsor medical devices. However, the agency has authority to take action if wirelessphones are shown to emit radiofrequency energy (RF) at a level that is hazardous tothe user. In such a case, FDA could require the manufacturers of wireless phones tonotify users of the health hazard and to repair, replace or recall the phones so that thehazard no longer exists.Although the existing scientific data do not justify FDA regulatory actions, FDA hasurged the wireless phone industry to take a number of steps, including the following:• Support needed research into possible biological effects of RF of the typeemitted by wireless phones; • Design wireless phones in a way that minimizes any RF exposure to the userthat is not necessary for device function; and • Cooperate in providing users of wireless phones with the best possibleinformation on possible effects of wireless phone use on human health.FDA belongs to an interagency working group of the federal agencies that haveresponsibility for different aspects of RF safety to ensure coordinated efforts atthe federal level. The following agencies belong to this working group:• National Institute for Occupational Safety and Health • Environmental Protection Agency 27Firefly-PG_D2 11/22/04 5:11 PM Page 27
• Federal Communications Commission • Occupational Safety and Health Administration • National Telecommunications and Information Administration The National Institutes of Health participates in some interagency working groupactivities, as well.FDA shares regulatory responsibilities for wireless phones with the FederalCommunications Commission (FCC). All phones that are sold in the United Statesmust comply with FCC safety guidelines that limit RF exposure. FCC relies on FDAand other health agencies for safety questions about wireless phones.FCC also regulates the base stations that the wireless phone networks rely upon. Whilethese base stations operate at higher power than do the wireless phones themselves,the RF exposures that people get from these base stations are typically thousands oftimes lower than those they can get from wireless phones. Base stations are thus notthe primary subject of the safety questions discussed in this document.What kinds of phones are the subject of this update?The term wireless phone refers here to hand-held wireless phones with built-inantennas, often called cell, mobile, or PCS phones. These types of wireless phonescan expose the user to measurable radiofrequency energy (RF) because of the shortdistance between the phone and the user's head. These RF exposures are limited byFederal Communications Commission safety guidelines that were developed with theadvice of FDA and other federal health and safety agencies. When the phone islocated at greater distances from the user, the exposure to RF is drastically lowerbecause a person's RF exposure decreases rapidly with increasing distance from thesource. The so-called cordless phones, which have a base unit connected to thetelephone wiring in a house, typically operate at far lower power levels, and thusproduce RF exposures well within the FCC's compliance limits.What are the results of the research done already?The research done thus far has produced conflicting results, and many studies havesuffered from flaws in their research methods. Animal experiments investigating theeffects of radiofrequency energy (RF) exposures characteristic of wireless phones haveyielded conflicting results that often cannot be repeated in other laboratories. A fewanimal studies, however, have suggested that low levels of RF could accelerate thedevelopment of cancer in laboratory animals. However, many of the studies thatshowed increased tumor development used animals that had been geneticallyengineered or treated with cancer-causing chemicals so as to be pre-disposed todevelop cancer in the absence of RF exposure. Other studies exposed the animals to 28Firefly-PG_D2 11/22/04 5:11 PM Page 28
RF for up to 22 hours per day. These conditions are not similar to the conditionsunder which people use wireless phones, so we don't know with certainty what theresults of such studies mean for human health.Three large epidemiology studies have been published since December 2000.Between them, the studies investigated any possible association between the use ofwireless phones and primary brain cancer, glioma, meningioma, or acoustic neuroma,tumors of the brain or salivary gland, leukemia, or other cancers. None of the studiesdemonstrated the existence of any harmful health effects from wireless phone RFexposures. However, none of the studies can answer questions about long-termexposures, since the average period of phone use in these studies was around threeyears.What research is needed to decide whether RF exposure from wireless phones poses ahealth risk?A combination of laboratory studies and epidemiological studies of people actuallyusing wireless phones would provide some of the data that are needed. Lifetimeanimal exposure studies could be completed in a few years. However, very largenumbers of animals would be needed to provide reliable proof of a cancer promotingeffect if one exists. Epidemiological studies can provide data that is directly applicableto human populations, but 10 or more years' follow-up may be needed to provideanswers about some health effects, such as cancer. This is because the intervalbetween the time of exposure to a cancer-causing agent and the time tumors develop- if they do - may be many, many years. The interpretation of epidemiological studiesis hampered by difficulties in measuring actual RF exposure during day-to-day use ofwireless phones. Many factors affect this measurement, such as the angle at whichthe phone is held, or which model of phone is used.What steps can I take to reduce my exposure to radiofrequency energy from my wirelessphone?If there is a risk from these products--and at this point we do not know that thereis—it is probably very small. But if you are concerned about avoiding even potentialrisks, you can take a few simple steps to minimize your exposure to radiofrequencyenergy (RF). Since time is a key factor in how much exposure a person receives,reducing the amount of time spent using a wireless phone will reduce RF exposure.If you must conduct extended conversations by wireless phone every day, you couldplace more distance between your body and the source of the RF, since the exposurelevel drops off dramatically with distance. For example, you could use a headset andcarry the wireless phone away from your body or use a wireless phone connected to aremote antenna.29Firefly-PG_D2 11/22/04 5:11 PM Page 29
Again, the scientific data do not demonstrate that wireless phones are harmful. But ifyou are concerned about the RF exposure from these products, you can usemeasures like those described above to reduce your RF exposure from wireless phoneuse.What about children using wireless phones?The scientific evidence does not show a danger to users of wireless phones, includingchildren and teenagers. If you want to take steps to lower exposure to radiofrequencyenergy (RF), the measures described above would apply to children and teenagersusing wireless phones. Reducing the time of wireless phone use and increasing thedistance between the user and the RF source will reduce RF exposure.Some groups sponsored by other national governments have advised that children bediscouraged from using wireless phones at all. For example, the government in theUnited Kingdom distributed leaflets containing such a recommendation in December2000. They noted that no evidence exists that using a wireless phone causes braintumors or other ill effects. Their recommendation to limit wireless phone use bychildren was strictly precautionary; it was not based on scientific evidence that anyhealth hazard exists.Where can I find additional information?For additional information, please refer to the following websites:Federal Communications Commission (FCC) RF Safety Programhttp://www.fcc/gov/oet/rfsafetyU.S. Food and Drug Administration (FDA) Center for Devices and Radiological Healthhttp://www.fda.gov/cdrh/consumerCellular Telecommunications Industry Associationhttp://www.wow-com.comNational Radiological Protection Board (U.K.)http://www.nrpb.org.ukWorld Health Organization (WHO) International EMF Projecthttp://www.who.int/emf30Firefly-PG_D2 11/22/04 5:11 PM Page 30
Safety Information 1 . SAFETY INFORMATION FOR FIXED WIRELESS TERMINALS .POTE NTIALLY EXPLOSIVE ATMOSPHERES Turn your phone OFF when in any area with a potentially explosive atmosphere and obey all signs and instructions. Sparks in such areas could cauls e an explosion or fire resulting in bodily injury or even death. INTERFERENCE TO MEDICAL DIVICES Certain electronic equipment may be shielded against RF signal from you wireless phone. (pacemakers, Hearing Aids, and so on) Turn your phone OFF in health c are facilities when any regulations posted in these areas instruct you to do so. RF signals may affect improperly installed or inadequately shielded electronic system in motor vehicles. .EXPOSURE TO RF ENERGY Use only the supplied or an approved replacement antenna. Do not touch the antenna unnecessarily when the phone is in use. Do not move the antenna close to, or couching any exposed part of the body when making a call. SAFETY INFORMATION FOR RF EXPOSURE Body worn operation This device was tested for typical body-worn operations with the back of the phone kept 15 mm. from the body. To maintain compliance with FCC RF exposure requirements, use only belt-clips, holsters or similar accessories that maintain a 15 mm. separation distance between the user’s body and the back of the phone, including the antenna. The use of belt-clips, holsters and similar accessories should not contain metallic components in its assembly. The use of accessories that do not satisfy these requirements may not comply with FCC RF exposure requirements, and should be avoided.
SAR INFORMATION THIS MODEL PHONE MEETS THE GOVERNMENT’S REQUIREMENTS FOR EXPOSURE TO RADIO WAVES. Your wireless phone is a radio transmitter and receiver. It is designed and manufactured not to exceed the emission limits for exposure to radiofrequency (RF) energy set by the Federal Communications Commission of the U.S. Government. These limits are part of comprehensive guidelines and establish permitted levels of RF energy for the general population. The guidelines are based on standards that were developed by independent scientific organizations through periodic and thorough evaluation of scientific studies. The standards include a substantial safety margin designed to assure the safety of all persons, regardless of age and health. The exposure standard for wireless mobile phones employs a unit of measurement known as the Specific Absorption Rate, or SAR. The SAR limit set by the FCC is 1.6 W/kg. * Tests for SAR are conducted with the phone transmitting at its highest certified power level in all tested frequency bands. Although the SAR is determined at the highest certified power level, the actual SAR level of the phone while operating can be well below the maximum value. This is because the phone is designed to operate at multiple power levels so as to use only the power required to reach the network. In general, the closer you are to a wireless base station antenna, the lower the power output. Before a phone model is available for sale to the public, it must be tested and certified to the FCC that it does not exceed the limit established by the government adopted requirement for safe exposure. The tests are performed in positions and locations (e.g., at the ear and worn on the body) as required by the FCC for each model. The highest SAR value for this model phone when tested for use at the ear is 1.41 W/Kg and when worn on the body , as described in this user guide, is 1.03 W/Kg . (Body-worn measurements differ among phone models, depending upon available accessories and FCC requirements). While there may be differences between the SAR levels of various phones and at various positions, they all meet the government requirement for safe exposure. The FCC has granted an Equipment Authorization for this model phone with all reported SAR levels evaluated as in compliance with the FCC RF exposure guidelines. SAR information on this model phone is on file with the FCC and can be found under the Display Grant section of http://www.fcc.gov/ oet/fccid after searching on FCC ID: R7C-C100. Additional information on Specific Absorption Rates (SAR) can be found on the Cellular Telecommunications Industry Asso-ciation (CTIA) web-site at http://www.wow-com.com. * In the United States and Canada, the SAR limit for mobile phones used by the public is 1.6 watts/kg (W/kg) averaged over one gram of tissue. The standard incorporates a sub-stantial margin of safety to give additional protection for the public and to account for any variations in measurements.
U.S.A. U.S.FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT INFORMATION TO THE USER NOTE : This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful Interference in a residential installation This equipment generates, uses, and can radiate radio frequency energy and, if Not installed and used in accordance with the instructions, may cause harmful Interference to radio communications. However, there is no guarantee that interference will not occur in a particular Installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: *- Reorient or relocate the receiving antenna. Increase the separation between the equipment and receiver.　 *- Connect the equipment into an outlet of a circuit different from that to which the receiver is connected. *- Consult the dealer or an experienced radio/TV technician for assistance. Changes or modification not expressly approved by the party responsible for Compliance could void the user’s authority to operate the equipment. Connecting of peripherals requires the use of grounded shielded signal cables. FCC Compliance Information This device complies with Part 15 of FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received. Including interference that may cause undesired operation.

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