Acorn Ltl-5310 Series, Руководство пользователя

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have an access to a TV, wait for 1 minute and detach the
battery box. Then you can view the information on the TFT
display.
When appear Mobile operators trademark buzzer will be
issued two sound "di, di".
There are three bars indicating the signal strength. To allow the
MMS function to perform, at least one bar is required.
If a code, instead of the MPNO information, shows on the
screen, it indicates something is wrong, missing, or going on.
Specifically,
 SIM: No SIM card or installed incorrectly.
 CSQ: No signals.
 CREG: SIM card is password-protected, or
deactivated due to zero balance in the account, or
not able to register with the GSM system.
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