AT&T Z431 User Guide

 
•  
When disposing of a battery, be sure it is nonconducting by applying vinyl tape to 
the (+) and (-) terminals.
•    Do not attempt to disassemble or modify the battery.
•   
Do not drop or throw the handset.
•   
Do not subject the handset to harsh treatment.
•   
Stop using the battery if you notice it becoming abnormally hot, or if you notice 
any odor, discoloration, deformation, or anything abnormal occurring when 
using the phone, charging the battery, or when the phone and/or battery are...

 
•  
Do not try to make a call while the temperature of the battery is above 113°F 
(45°C).
•    Take care not to put your handset in your back pocket and then sit on it. Also, 
do not put your phone at the bottom of a bag where it may be subjected to 
excessive weight or pressure. Doing so may damage the LCD and camera lens.
•    The operation of some medical electronic devices, such as hearing aids and 
pacemakers, may be affected if a handset is used in close proximity with them. 
Observe any...

 
Road Safety
•  
You must exercise proper control of your vehicle at all times. Give your full 
attention to driving.
•    Pull over to the side of the road and park before making or answering a call, if 
driving conditions require it.
•    Obey all local laws regarding the use of handsets while driving.
•   
Do not stop on the hard shoulder of a highway to answer or make a call, except in 
an emergency.
•    Switch off your handset at a gas station, even if you are not refueling your car.
•   
Do not...

 
Notes:
•   Tell the operator which service you require: Police, Fire, or Ambulance. Tell them 
where you are and remain stationary to maintain contact if possible.
•    Due to the nature of the cellular system, emergency calls cannot be guaranteed. 
You should never rely solely on any wireless device in emergency situations.
HAC Mode
When HAC mode is active, your phone sends the audio signals from your phone 
to the telecoil rather than to the microphone of your hearing aid. The HAC setting 
only...

62Troubleshooting and FAQs
 
63
Troubleshooting and FAQs
Problem Possible Causes Possible Solution
SIM card error 
SIM card is damaged or 
defective.Take the SIM card to a service 
center for testing.
SIM card inserted improperly. Check to ensure that the 
SIM card is facing the right 
direction and that it is fully 
inserted into the slot.
Dirt or debris on the SIM card 
contacts.
Use a soft, dry cloth to clean 
the SIM card contacts.
PIN code is 
blocked You have entered an incorrect 
PIN code ten...

Specifications
64Specifications
Note: Talk time and idle time are based on ideal working environments. Use of 
certain phone functions and network conditions can reduce battery life and talk/
idle time. This mobile phone complies with part 15 of the FCC Rules. Operation is subject to 
the following two conditions: 
   
This device may not cause harmful interference, and 
   This device must accept any interference received, including interference that 
may cause undesired operation.
This device has been...

Radio Frequency (RF) Energy
This model phone meets the government’s requirements for exposure to  
radio waves.
This phone is designed and manufactured not to exceed the emission limits for 
exposure to radio frequency (RF) energy set by the Federal Communications 
Commission of the U.S. Government:
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 1.6W/kg.* Tests for SAR are conducted using...

Warranty
ZTE offers you a limited warranty that the enclosed subscriber unit and its 
enclosed accessories will be free from defects in material and workmanship for a 
period that expires one year from the date of sale of the Product to you, provided 
that you are the original enduser purchaser of the Product and provided that your 
purchase was made from a supplier authorized by the Seller. Transfer or resale 
of a Product will automatically terminate warranty coverage with respect to that 
Product....

 
How to Get Warranty Service
To obtain warranty service, please call (877) 817-1759. Please have the following 
information available when you send the phone in for repair:
•   A valid Proof of Purchase
•   
Return address
•   
Daytime phone number or fax number
•   
Model #
•   
IMEI # (Look for the 15-digit IMEI # behind the battery of the device.)
•   
Complete description of the problem
•   
Transportation prepaid
Other Warranty Program
You may have other warranty programs with your purchase, such...

Notes
72Notes