Useful Mobile Phone Codes For LG and Samsung.

LG Mobile Codes:

Type

2945#*#  For LG all models test mode  
2945*#01*# Secret menu for LG IMEI (ALL):
*#06# IMEI and SW (LG 510):
*#07# Software version (LG B1200):
*8375# Recount cheksum (LG B1200):
*6861# Factory test (B1200):
#PWR 668 Simlock menu (LG B1200):
1945#*5101# Simlock menu (LG 510W, 5200):
2945#*5101# Simlock menu (LG 7020, 7010):
2945#*70001# Simlock menu (LG 500, 600):
2947#* LG-U81XX SPECIAL CODES Code to read phone version : - Phone without SIM
277634#*# or 47328545454# - Select 'SW Ver.info' Code to reset phone :  Phone without SIM 277634#*# or 47328545454# - Select 'Factory Reset' Code to enter UNLOCK MENU : - Phone wit SIM inside
2945#*88110# Test Menu 8330 :
637664#*# Test Menu 8180 V10a:
49857465454# Test Menu 8180 V11a:
492662464663# Test Menu 8130-8138:
47328545454# Test Menu 8110-8120:
277634#*#

Samsung Mobile Codes

Type:

*#06# SHOW IM OF PHONE
*#9999# Show software version
*#0001# Display RS232 serial communication parameter setup
*#8999*228# Display battery capacity and temperature / voltage
*#8999*523# Adjust display contrast
*#8999*636# Display storage capacity
*#8999*778# Display SIM card information
*#8999*324# The network checkout (engineering model)
*#8999*289# Ringtone test
*#8999*364# Display Watchdog state
*#8999*427# WATCHDOG signal route setup
*#8999*842# Vibrate test
*#8999*782# Show date and alarm clock
*#8999*246# Show the memory capacity
*#8999*786# The display during warning
*#8999*837# Samsung hardware version
*#8999*377# Software error LOG (wrong display of EEPROM)
*#8999*638# Show network information
*#8999*9266# Display received channel number and received intensity

NOTE: this tricks will not work for all mobiles, it will work for latest mobile and some will work for some phones