Huawei Technologies E3251S-81 DC-HSPA+ USB Stick User Manual Safety Information
Huawei Technologies Co.,Ltd DC-HSPA+ USB Stick Safety Information
Contents
- 1. SafetyLeaflet.pdf
 - 2. UserManual.pdf
 
SafetyLeaflet.pdf
Safety Information 

Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved. 
No part of this manual may be reproduced or transmitted in any form or by any 
means without prior written consent of Huawei Technologies Co., Ltd. and its 
affiliates ("Huawei"). 
The product described in this manual may include copyrighted software of Huawei 
and possible licensors. Customers shall not in any manner reproduce, distribute, 
modify, decompile, disassemble, decrypt, extract, reverse engineer, lease, assign, 
or sublicense the said software, unless such restrictions are prohibited by 
applicable laws or such actions are approved by respective copyright holders. 
Trademarks and Permissions 
,  , and   are trademarks or registered trademarks of Huawei 
Technologies Co., Ltd. 
Other trademarks, product, service and company names mentioned may be the 
property of their respective owners. 
Notice 
Some features of the product and its accessories described herein rely on the 
software installed, capacities and settings of local network, and therefore may not 
be activated or may be limited by local network operators or network service 
providers. 
Thus, the descriptions herein may not exactly match the product or its accessories 
which you purchase. 
Huawei reserves the right to change or modify any information or specifications 
contained in this manual without prior notice and without any liability. 
DISCLAIMER 
ALL CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS”. EXCEPT AS 
REQUIRED BY APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
PURPOSE, ARE MADE IN RELATION TO THE ACCURACY, RELIABILITY OR 
CONTENTS OF THIS MANUAL. 
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT 
SHALL HUAWEI BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR 
CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS, BUSINESS, REVENUE, 
DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS REGARDLESS OF 
WHETHER SUCH LOSSES ARE FORSEEABLE OR NOT. 
THE MAXIMUM LIABILITY (THIS LIMITATION SHALL NOT APPLY TO LIABILITY 
FOR PERSONAL INJURY TO THE EXTENT APPLICABLE LAW PROHIBITS 
SUCH A LIMITATION) OF HUAWEI ARISING FROM THE USE OF THE PRODUCT 
DESCRIBED IN THIS MANUAL SHALL BE LIMITED TO THE AMOUNT PAID BY 
CUSTOMERS FOR THE PURCHASE OF THIS PRODUCT. 
Import and Export Regulations 
Customers shall comply with all applicable export or import laws and regulations 
and be responsible to obtain all necessary governmental permits and licenses in 
order to export, re-export or import the product mentioned in this manual including 
the software and technical data therein. 
Privacy Policy 
To better understand how we protect your personal information, please see the 
privacy policy at http://consumer.huawei.com/en/privacy-policy/index.htm. 
Safety information 
This section contains important information about the operation of your device. It 
also contains information about how to use the device safely. Read this information 
carefully before using your device. 
Electronic device 
Do not use your device if using the device is prohibited. Do not use the device if 
doing so causes danger or interference with other electronic devices. 
Interference with medical equipment 
 Follow rules and regulations set forth by hospitals and health care facilities. Do 
not use your device where prohibited. 
 Some wireless devices may affect the performance of hearing aids or 
pacemakers. Consult your service provider for more information. 
 Pacemaker manufacturers recommend that a minimum distance of 15 cm be 
maintained between a device and a pacemaker to prevent potential interference 
with the pacemaker. If using a pacemaker, hold the device on the side opposite 
the pacemaker and do not carry the device in your front pocket. 
Areas with flammables and explosives 
 Do not use the device where flammables or explosives are stored (in a gas 
station, oil depot, or chemical plant, for example). Using your device in these 
environments increases the risk of explosion or fire. In addition, follow the 
instructions indicated in text or symbols. 
 Do not store or transport the device in containers with flammable liquids, gases, 
or explosives. 
Traffic security 
 Observe local laws and regulations while using the device. To reduce the risk of 
accidents, do not use your wireless device while driving. 
 Concentrate on driving. Your first responsibility is to drive safely. 
 RF signals may affect the electronic systems of motor vehicles. For more 
information, consult the vehicle manufacturer. 
 Do not place the device over the air bag or in the air bag deployment area in a 
motor vehicle. Doing so may hurt you because of the strong force when the air 
bag inflates. 
 Do not use your device while flying in an aircraft or immediately before boarding. 
Using wireless devices in an aircraft may disrupt wireless networks, present a 
hazard to aircraft operation, or be illegal.   
Operating environment 
 Avoid dusty, damp, or dirty environments. Avoid magnetic fields. Using the device 
in these environments may result in circuit malfunctions. 
 Do not use your device during thunderstorms to protect your device against any 
danger caused by lightning.   
 Ideal operating temperatures are -10 °C to +45 °C. Ideal storage temperatures 
are -20°C to +70 °C. Extreme heat or cold may damage your device or 
accessories. 
 Keep the device and accessories in a well-ventilated and cool area away from 
direct sunlight. Do not enclose or cover your device with towels or other objects. 
Do not place the device in a container with poor heat dissipation, such as a box 
or bag. 
 Do not expose your device to direct sunlight (such as on a car dashboard) for 
prolonged periods.   
 To protect your device or accessories from fire or electrical shock hazards, avoid 
rain and moisture. 
 Keep the device away from sources of heat and fire, such as a heater, microwave 
oven, stove, water heater, radiator, or candle. 
 Stop using your device or applications for a while if the device is overheated. If 
skin is exposed to an overheated device for an extended period, low temperature 
burn symptoms, such as red spots and darker pigmentation, may occur.   
 Do not touch the device's antenna. Otherwise, communication quality may be 
reduced.   
 Do not allow children or pets to bite or suck the device or accessories. Doing so 
may result in damage or explosion. 
 Observe local laws and regulations, and respect the privacy and legal rights of 
others.   
Child's safety 
 Comply with all precautions with regard to child's safety. Letting children play with 
the device or its accessories may be dangerous. The device includes detachable 
parts that may present a choking hazard. Keep away from children. 
 The device and its accessories are not intended for use by children. Children 
should only use the device with adult supervision.   

Accessories 
 Using an unapproved or incompatible power adapter, charger or battery may 
cause fire, explosion or other hazards.   
 Choose only accessories approved for use with this model by the device 
manufacturer. The use of any other types of accessories may void the warranty, 
may violate local regulations and laws, and may be dangerous. Please contact 
your retailer for information about the availability of approved accessories in your 
area. 
Cleaning and maintenance 
 Keep the device and accessories dry. Do not attempt to dry it with an external 
heat source, such as a microwave oven or hair dryer.   
 Do not expose your device or accessories to extreme heat or cold. These 
environments may interfere with proper function and may lead to fire or 
explosion.   
 Avoid collision, which may lead to device malfunctions, overheating, fire, or 
explosion.   
 Before you clean or maintain the device, stop using it, stop all applications, and 
disconnect all cables connected to it. 
 Do not use any chemical detergent, powder, or other chemical agents (such as 
alcohol and benzene) to clean the device or accessories. These substances may 
cause damage to parts or present a fire hazard. Use a clean, soft, and dry cloth 
to clean the device and accessories. 
 Do not place magnetic stripe cards, such as credit cards and phone cards, near 
the device for extended periods of time. Otherwise the magnetic stripe cards may 
be damaged. 
 Do not dismantle or remanufacture the device and its accessories. This voids the 
warranty and releases the manufacturer from liability for damage. In case of 
damage, contact an authorized service center for assistance or repair. 
Environmental protection 
 The device and its accessories (if included), such as the power adapter, headset, 
and battery should not be disposed of with household garbage. 
 Disposal of the device and its accessories is subject to local regulations. Support 
proper collection and recycling. 
Disposal and recycling information 
 This symbol (with or without a solid bar) on the device, batteries (if 
included), and/or the packaging, indicates that the device and its electrical 
accessories (for example, a headset, adapter, or cable) and batteries should not be 
disposed of as household garbage. These items should not be disposed of as 
unsorted municipal waste and should be taken to a certified collection point for 
recycling or proper disposal. 
For more detailed information about device or battery recycling, contact your local 
city office, household waste disposal service, or retail store. 
Disposal of the device and batteries (if included) is subject to WEEE Directive 
Recast (Directive 2012/19/EU) and Battery Directive (Directive 2006/66/EC). The 
purpose of separating WEEE and batteries from other waste is to minimize the 
potential environmental impacts and human health risk of any hazardous 
substances that may be present. 
Reduction of hazardous substances 
This device is compliant with the REACH Regulation [Regulation (EC) No 
1907/2006] and RoHS Directive Recast (Directive 2011/65/EU). Batteries (if 
included) are compliant with the Battery Directive (Directive 2006/66/EC). For 
up-to-date information about REACH and RoHS compliance, please visit the web 
site www.huaweidevice.com/certification. 
EU regulatory conformance 
RF exposure requirements 
Important safety information regarding radio frequency (RF) radiation exposure:   
RF exposure guidelines require that the device be used at a minimum of 1.5 cm 
from the human body. Failure to observe this guideline may result in RF exposure 
exceeding limits. 
Certification information (SAR) 
This device meets guidelines for exposure to radio waves. 
Your device is a low-power radio transmitter and receiver. As recommended by 
international guidelines, the device is designed not to exceed the limits for exposure 
to radio waves. These guidelines were developed by the International Commission 
on Non-Ionizing Radiation Protection (ICNIRP), an independent scientific 
organization, and include safety measures designed to ensure the safety of all 
users, regardless of age and health. 
The Specific Absorption Rate (SAR) is the unit of measurement for the amount of 
radio frequency energy absorbed by the body when using a device. The SAR value 
is determined at the highest certified power level in laboratory conditions, but the 
actual SAR level during operation can be well below the value. This is because the 
device is designed to use the minimum power required to reach the network. 
The SAR limit adopted by Europe is 2.0 W/kg averaged over 10 grams of tissue, 
and the highest SAR value for this device complies with this limit.   
Statement 
Hereby, Huawei Technologies Co., Ltd. declares that this device is in compliance 
with the essential requirements and other relevant provisions of Directive 
1999/5/EC. 
For the declaration of conformity, visit the web site 
www.huaweidevice.com/certification. 
The following marking is included in the product: 
This device may be operated in all member states of the EU. 
Observe national and local regulations where the device is used. 
This device may be restricted for use, depending on the local network. 
FCC Regulatory Compliance 
RF exposure requirements 
Important safety information regarding radio frequency (RF) radiation exposure:   
RF exposure guidelines require that the device be used at a minimum of 0.5 cm 
from the human body. Failure to observe this guideline may result in RF exposure 
exceeding limits. 
Certification information (SAR) 
This device is also designed to meet the requirements for exposure to radio waves 
established by the Federal Communications Commission (USA). 
The SAR limit adopted by the USA is 1.6 W/kg averaged over one gram of tissue. 
The highest SAR value reported to the FCC for this device type complies with this 
limit. 
FCC statement 
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 on a circuit different from that to which the 
receiver is connected. 
--Consult the dealer or an experienced radio/TV technician for help. 
This device complies with Part 15 of the 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. 
Caution: Any changes or modifications to this device not expressly approved by 
Huawei Technologies Co., Ltd. for compliance could void the user's authority to 
operate the equipment. 
Please visit www.huaweidevice.com/worldwide/support/hotline for recently updated 
hotline and email address in your country or region. 
Version: V100R001_01   Part Number: 3122****