a.SAMSUNG CODES:
*#06# imei No to destroy a stolen phone

*2767*2878# Master unlock code

*2767*7377# For unlocking version

*2767*3855# Eeprom reset

#30228# For temperature and battery capacity

*#0523# LCD Contrast settings

*#9999# List software version

*#0837# Production date and so version.

*#9998*268# Default logo,display country when powering up.

*#9998*4357# List majority of test commands

*#0001# Communication parameter

*#0324# Engineering test mode

*#0636# Memory capacity

*#0842# To test vibrator

*#0289# To correct battery

*#9998*228# Temperature and repair

*1999# Audio Problem

*#0778#,*#998*0778# view sim information

*#0782# List current time

*#0523#,*#9998*523# LCD SETTINGS