qualified for the mobile phone* secret code is required in the know* and I believe that engineers are mobile secret code* but not necessarily for the user know that the mobile phone that has a secret code* below is a secret code LG mobile phone
LG
2945#*# - service menu (code reset)(W3000 G5300 C1200 G7100...)
2945#(*)- hold (LG 500*600)
B1200 *+pwr* 6*6*8 Service Menu
B1300 *+pwr* 1*5*9 Service Menu

Security Removing Code For Lg 8110*8120.
47328545454#
Or
277634#*#
LG
2945#*# - service menu (code reset)(W3000 G5300 C1200 G7100...)
2945#(*)- hold (LG 500*600)
B1200 *+pwr* 6*6*8 Service Menu
B1300 *+pwr* 1*5*9 Service Menu

Security Removing Code For Lg 8110*8120.
47328545454#
Or
277634#*#

U8180 old ...............49857465454#
U8180 new .............492662464663#
U8330 ...................637664#*#
U8360 ...................*6*41*12##
U8380 ...................525252#*#


ALL LG 2G : 2945#*#
8110 & 8120 : 277634#*#
U8130 & U8138 : 47328545454#
8180 old sw : 49857465454#
8180 new sw : 492662464663#
8330 : 637664#*#
8360 : *6*41*12##
8380 : 525252#*#
by mohamed
LG 8550 885508428679#*#
Phone
Service Menu Code

8110 277634#*#

8120 277634#*#

8130 47328545454#

8138 47328545454#

8180 v10A 49857465454#

8180 v11A 492662464663#

8330 637664#*#

by mohamed

8360 *6*41*12##

8380 525252#*#

8550 885508428679#*#

Phone
Unlock Menu Code

Older phones 2945#*88110#


U880
was told that unlocking code for the phone is "0794070061"
and method is to enter 142358#*#
but when i enter above code instead of asking for nck code it restarts(phone is temporary unlocked with sim inside).
Plz help how to unlock it permanently


After complete Flashing just Enter 142358#*#

hopefully useful to you* although still short of many but I will try to provide the best for you 
With the help of these codes, you can get hidden information of LG handsets and troubleshoot the routine problems.
Here is the list of LG Secret Codes:
LG all models test mode: Type 2945#*# on the main screen. 
2945*#01*# Secret menu for LG 
IMEI (FOR ALL PHONES): *#06# 
IMEI and SW (LG 510): *#07# 
Software version (LG B1200): *8375# 
Recount cheksum (LG B1200): *6861# 
Factory test (B1200): #PWR 668 
Sim-lock menu (LG B1200): 1945#*5101# 
Sim-lock menu (LG 510W, 5200): 2945#*5101# 
Sim-lock menu (LG 7020, 7010): 2945#*70001# 
Sim-lock menu (LG 500, 600): 2947#*

LG-U81XX SPECIAL CODES 
Code to read phone version : 
- Phone without SIM 
- Enter 277634#*# or 47328545454# 
- Select 'SW Version info'
by réda bahlas
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#
mohamed najiri
Test Menu 8330 : 637664#*# 
Test Menu 8180 V10a: 49857465454# 
Test Menu 8180 V11a: 492662464663# 
Test Menu 8130-8138: 47328545454# 
Test Menu 8110-8120: 277634#*#