文档介绍：手机解锁秘诀(Mobile unlock secrets)
Answering machine lock: *2767*2878#/*2767*7377#
Samsung chip reset: *2767*3855# can alsode, please enter the following key combination: *#06# view IME string code
*#2254*# displays the status line
*#2255*# on or off (DEBUG CALL) mode
*#2558*# displays call time
The *#2562*# forces to reconnect the network system
*#7489*# displays and changes the phone code
*#7378*# displays some SIM card information, such as phase (phaselevel)
*#3377*# reads SIM card information, initialization and marking
*#7693*# turn on or off sleep mode
*#8463*# reads sleep mode information
*#337*# EFR mode on / off
*#4764*# single frequency / dual frequency setting (switching single frequency GSM900)
*#4765*# single frequency / dual frequency setting (switching single frequency GSM1800) *#4762*# single frequency / dual frequency setting (switched to dual band mode)
Al Carter (ALCATEL) test key
In standby mode, enter ”000000*" to monitor network status, including signal strength and channels used.
NEC DB2000 mobile phone input button in standby by the following:
"*#2820#”, then press the "call" button to display the software version of the phone.
"*73738#”, then press the call button, you can return to the mobile phone factory.
Samsung5 s early version of mobile phones can enter the following instructions and enter various test states:
Button code test function / name
*#9999# displays mobile phone software version number
The *2767*2878# phone is now reset (mobile unlock)
*2767*3855# phone EEPROM total reset (repair software failure)
*#9998*228# battery parameter read
*#9998*289# ringing signal frequency test *#9998*246# program parameter display
*#9998*364# WATCHDOG signal test *#9998*377# EEPROM error display
*#9998*427# WATCHDOG signal path setting
*9998*523# LCD contrast adjustment
*9998*636# storage status display
*9998*786# current date and time read
Vibration test of *9998*842# oscillator
*9998*947# reset settings under critica