Do you have a question about the Etross ET-360 and is the answer not in the manual?
Restore device to factory default settings using command *#9999#.
Set dial interval time for calls, e.g., *#01#30# for 3 seconds.
Set earphone volume level, from 1 (min) to 16 (max). Default is 15.
Set microphone sensitivity level, from 1 (min) to 16 (max). Default is 10.
Configure the local area code for dialing, e.g., *#04#*0755#.
Configure IP numbers for specific services, e.g., *#05#17911#.
Configure Caller ID presentation status (CLIR allowed/prohibited).
Set or disable barring for incoming calls.
Configure FSK caller ID format (requires FSK Chip set).
Select billing mode, e.g., reversal polarity or 12/16 KHz.
Configure PIN lock and network lock functions (optional).
Enable/disable PIN code check and automatic PIN lock.
Change the current SIM card PIN code and enable auto lock.
Enable or disable network lock feature.
Configure network codes based on IMSI for specific carriers.
Instructions for initiating calls using the terminal.
Procedure for answering incoming calls on the connected telephone.