
Advanced Settings
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There are three bars indicating the signal strength. To allow the MMS function to perform, at
least one bar of signal 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 or installed incorrectly.
• CSQ: No signals.
• CREG: SIM card is password-protected, or deactivated due to past-due balance in the
account, or not able to register with the GSM system.
• CGREG: Not able to register with GPRS network.
• COPS: Searching for the MNPO of the SIM card. Once it is found, the operator’s name
and the signal strength will show on the screen.
If appear below the picture, that means no installation MMS module: