BENQ SIEMENS
*#06# : Software version, to see more informasion, press softkey again
*#0001# : English menu
*#0049# : Deutsch menu
*#0606# : SecretCode (remove SIM card before)
*#0003*(SecretCode)# : Unlock SIM
*12022243121# : Bonus screen
*#9999#: to reset factory settings

SIEMENS
*#06# Display IMEI
*2767*5282# Java reset (deletes all java midlets)
*2767*927# Wap reset
*#9998*4357# Help menu
*#9998*5282# Java menu
*#9999#0# Monitor mode
*#9999# Software version
*#8888# Hardware version
*#9998*746# SIM info
*#9998*523# Display contras
*#9998*842# Vibration on (until your press ok)
*#9998*283# Buzzer on (until your press ok)
*#9998*288# Battery and Field info
*#9998*377# Error log


SONY ERICSSON
*#06# for checking the IMEI (International Mobile Equipment Identity)
*#0000# to reset the phones menu language to English
>*<<*<* For checking the firmware revision informasion (software realease)
>*<<*<*> 1-row text string. if pressing yes you can check the phones text programming in currently selected language (298 entries)
>*<<*<*>> n-row text string. if pressing yes you can check the phones text programming in currently selected language (160 entries)
The Service Provider (SP) lock menu is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator. If one insert a SIM card frome a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator. To activate / deactivate this lock one need a special screet code that is not available to the end user.
<**< Lock to network? if pressing yes you have 5 attempts to enter NCK
<*<< Lock to network subset? if pressing yes you have 5 attempts to enter NSCK.
WARNING!!!: Your phone can be locked to a service provider forever by doing this! if an invalid code is entered all five times the menu will exit and be deactivated! any further attempt to activate the NCK/NSCK lock menu will result in the response "not allowed"! however the NCK/NSCK lock can be recover through a direct clearing in the EEPROOM
Sortcut for last dialled press 0 then #