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provided by the network operator should be input;
SIM card error
There is some dirt o the metal surface of the SIM card. Please wipe the
metal contacts of the SIM card with a clean cloth ;
SIM card is not installed. You should install the SIM card based on the
User’s Manual.
SIM card is damaged. Please contact with your network supplier;
Cannot access to network
The signal is weak, please move to the place where the signal is strong
and retry; Beyond the coverage of the network of the network server;
SIM card is invalid, please contact with your network supplier;
Cannot dial out
Please confirm whether the dial key is pressed after the number is
dialed;
Please confirm whether the call is barred due to owned toll;
Please confirm whether the SIM card is valid or not;
Please confirm whether the call restriction function is set up;
Please confirm whether the fixed dial function is set up;
Bad call quality
Check whether the volume is adjusted appropriately;
Use the phone at the place where the receiving quality is not good,
such as near to the building or in the basement where the radio wave
cannot reach.
Use the phone at the peak time, such as at the time of going on/off the
duty, the channel is congested;
Failed to call you
Please confirm that the phone is powered on and is uplinked with
network;
Please confirm that the call is barred because of owned toll;
Please confirm whether the SIM card is valid;
Please confirm whether the fixed dial function is set up;
Failed to hear you
