*#9999# or *#0837# displays the software version;
*#000 1# displays RS232 serial communication parameter settings;
*#0228# Display battery capacity and temperature;
*#0523# Adjust the contrast;
*#0636# Memory capacity display
*#0778#
SIM card information
*#0324# Network Detection (Engineering Mode)
*2767*2878#
The current setting of EEPROM mobile phone is reset, and the mobile phone setting is always cleared, which is often used for unlocking.