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NOKIA

*#06# :for IMEI
*#92702689# :All Manufacture (Warranty)
*#3370# :Enable EFR (To disable, Type it again. Phone Automatically Restart)
*#0000# :View Software version
*#7780# :Restore factory settings
*#67705646# :Clear LCD Display (Operator Logo)
*#2820# :Bluetooth device address
*#746025625# :SIM lock allowed statue
*#62209526# : Display the MAC address
#pw+1234567890+1# :Show if SIM restrictors.
*#4720# :half rate Codec activation (To disable, Type it again)

*#7370925538# :S-60 (Reset)
Default code is 12345

*#3925538# : Delete the contents and code of wallet
*#7328748263373738# :Reset Phone Code. Default code is 12345

Below are some reset codes for various Series 40, 60 and the new Series 80 Communicator series (Nokia 9300/9500):

Full Reset: (clears everything off the phone memory!! Be sure to back up your contacts!!): *#7370#, 12345 and then Yes.

Soft Reset: *#7780#, 12345 and then Yes. (Also works on Nokia S40 phones as a full reset)

*#335738#
*#delset#

This deletes the Email, GPRS, MMS settings that cannot be erased via phone options. (Newer Series 40 phones only i.e. 6230(b))

SAMSUNG

*#1234# :SW Version
*#2222# :HW Version
*#0842# :Vibrator Test
*#0289# :Buzzer Test
*#0228# :Battery Statue
*#0782# :RTC Display
*#0523# :LCD Contrast
*#0377# :NVM error Log
*#5646# :Logo set
*#0778# :SIM Service Table
*#0638# :SIM Network ID
*#0746# :SIM Info
*#076# : Production no
*#2576# :SIM errors

Lock Manager

*2767*2878# :EPROM Reset
*2767*3855# :Master Reset
*#2767*63342# :Media Reset
*2767*667# :MMS reset
*2767*927# :WAP Reset

If you’re Phone will not reset by using those code:
*2767*637#
*2767*688#
#*7337#
*#9998*3323#
*#9998*627837793#
*2767*7822573738#

Unlock Code
Model: Samsung SGH-E715

Turn off the phone. Put a non-accepted SIM Card and turn it on. Type*#9998*3323#. Press Exit. Choose menu #7. After phone reboots type*0141# and hit the Call button. Turn off and insert another SIM Card.Turn on. The code is 00000000.

Model: Samsung SGH-M100

Type *#9998*627837793#. Then type *#9998*737#. Press >/ [] (PlayStop) until phone shows NCK/SPCK number. Press Exit. Type #0111*CODE#(Code is the last 8 digits of the NCK/SPCK)

Model: Samsung SGH-S105

Remove SIM Card. Enter *2767*7822573738# and after phone reboots, enter #0111*00000000#

Model: Samsung SGH-S307

Turn off the phone. Put a non-accepted SIM Card and turn it on. Type*#9998*3323#. Press Exit. Choose menu #7. After phone reboots type*0141# and hit the Call button. Turn off and insert another SIM Card.Turn on. The code is 00000000.

Model: Samsung SGH-X100

Turn off the phone. Put a non-accepted SIM Card and turn it on. Type*#9998*3323#. Press Exit. Choose menu #7. After phone reboots type*0141# and hit the Call button. Turn off and insert another SIM Card.Turn on. The code is 00000000.

Model: Samsung Universal

TEMPORARY UNLOCK:
Put a non-accepted SIM Card and turn it on. Type *#9998*3323#. Press Exit. You will get a new menu. Select Malloc Fail.

In newer phones:
#*7337#

LG

2945*#01*# :Secret menu for LG
*#06# :IMEI (ALL)
*#07# :IMEI and SW (LG 510)
*8375# :Software version (LG B1200)
*6861# :Recount cheksum (LG B1200)
1945#*5101# :Simlock menu (LG B1200)
2945#*5101# :Simlock menu (LG 510W, 5200)
2945#*70001# :Simlock menu (LG 7020, 7010)
2947#* :Simlock menu (LG 500, 600)

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#*#