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3. SIM card not resigstered
Reasons as below：
1. local signal is not stable
2. software is old version
3. hardware problem
You can：1. Try to log on at another place.
2. update the software
3. check the hardware or change another device to connect
again
4.Why prompt "can not connect to configuration files "？
Please add a configuration file manually.
5.Can not connect to internet?
Please make sure the configuration files and setting correct.
6.Connecting and data exchange too slow?
Please check local network signal strength.
7.Fail to send messages?
Please make sure message center number is correct.
8.Can not receive message?
Please check (U)SIM memory full or not.
9.Why only save a few names when add contacts?
The input character is longer than (U)SIM card
10. Does this support roaming?
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