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There are several ways to upgrade your phone software:
1. Use the online upgrade tool for mobile terminal
products.
2. Use the one-press upgrade package offered by your
mobile service provider.
3. Use the upgrade package on your microSDHC card.
NOTE: Visit the ZTE official handset service support
website (http://www.ztedevice.com/support) and
click your country or region to learn more about the
above upgrade methods, as well as which phones and
methods are supported.
Upgrading the Phone Software
70
If you encounter problems while using the phone, or if it performs abnormally, you can refer to the chart below.
If your particular problem cannot be resolved using the information in the chart, contact the dealer where you
purchased the phone.
Problem Possible Causes Possible Solution
Poor reception
The network signal is too weak at your
current location, for example, in a basement
or near a tall building, because wireless
transmissions can not effectively reach it.
Move to a location where the network
signal can be properly received.
The network is busy at the current time
(for example, during peak times, there may
be too much network traffic to handle
additional calls).
Avoid using the phone at such times, or try
again after waiting a short time.
You are too far away from a base station for
your service provider.
You can request a service area map from
your service provider.
Echo or noise
Poor network link quality on the part of
your service provider.
End the call and dial again. You may be
switched to a better-quality network link or
phone line.
Poor local telephone line quality.
End the call and dial again. You may be
switched to a better-quality network link or
phone line.
Unable to select
certain features
Your service provider does not support
these features, or you have not applied for
services that provide these features.
Contact your service provider.
Battery not
charging
The battery or battery charger is damaged. Contact the dealer.
The phone’s temperature is below 32°F
(0°C) or higher than 113°F (45°C).
Adjust the battery charging environment to
avoid extremes of temperature.
Poor contact between the battery and
charger.
Check all connectors to make sure all
connections have been properly made.
Troubleshooting
71
Z752C_UM_EN_3_7026.indd 72-73 1/8/15 10:22 AM
37


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