LG

On the main screen type *#06#

Information you get from the IMEI (International Mobile Equipment Identity)
    XXXXXX     XX     XXXXXX    X
        TAC      FAC       SNR     SP

TAC = Type approval code of your LG Mobile
FAC = Final assembly code of your cellphone
SNR = Serial number of your LG Phone
SP = Spare

 LG all models test mode:
  Type 2945#*# on the main screen.
  2945*#01*# Secret menu for LG
  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
  - Enter 277634#*# or 47328545454#
  - Select 'SW Ver.info'
  Code to reset phone :
  - Phone without SIM

  - Enter 277634#*# or 47328545454#
  - Select 'Factory Reset'

  Code to enter UNLOCK MENU :
  - Phone wit SIM inside
  - Enter 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#*