*01763*8371# (*01763*VER0#) - Firmware Version.
*01763*3641# (*01763*ENG1#) - Enable Engineer Mode hold power key to leave then disable.
*01763*3640# (*01763*ENG0#) - Disable Engineer Mode.
*01763*8781# (*01763*TST1#) - Test #1 (test early wdt looping to dump, need to remove battery from phone)
*01763*8782# (*01763*TST2#) - Test #2 (test irq dis looping to switch, resets itself

===

BenQ-Siemens Secret Codes

Software version:
*#06#
to see more info, press softkey again
English menu:
*#0001#
Deutsch menu:
*#0049#

*12022243121 is code for old Siemens model, like C35, M35 , S35 etc.
That code not working with BenQ-Siemens model.
Also you can change language in Siemens and BenQ-Siemens to any language( if you have that language support in mobile phone, of course) if you put between *# and # your country code with zeros before country code (zeros and counry code must have together four digits).
When you use code for language that not support language in mobile phones turn to automatic.
Examples:
*#0033# french
*#0385# croatian
*#0030# greek
*#0039# italien etc.

===

LG Secret Codes

LG all models test mode: Type 2945#*# on the main screen.
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#

===

Software version: *#9999#
IMEI number: *#06#
Serial number: *#0001#
Battery status- Memory capacity : *#9998*246#
Debug screen: *#9998*324# - *#8999*324#
LCD kontrast: *#9998*523#

===

IMEI number: * # 0 6 #
Software version: * # 0 0 0 0 #
Lub * # 9 9 9 9 #
Simlock info: * # 9 2 7 0 2 6 8 9 #
Enhanced Full Rate: * 3 3 7 0 # [ # 3 3 7 0 # off]
Half Rate: * 4 7 2 0 #
Provider lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 1
Network lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 2
Provider lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 3
SimCard lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 4 1234567890 -
MasterCode which is generated from IMEI *#92702689# [*#war0anty#] Warranty code.

===

Samsung T100 Specific Codes

Battery status (capacity, voltage, temperature): * # 8 9 9 9 * 2 2 8 #
Program status: * # 8 9 9 9 * 2 4 6 #
Change Alarm Buzzer Frequency: * # 8 9 9 9 * 2 8 9 #
Debug screens: * # 8 9 9 9 * 3 2 4 #
Watchdog: * # 8 9 9 9 * 3 6 4 #
EEPROM Error Stack: * # 8 9 9 9 * 3 7 7 #
Trace Watchdog: * # 8 9 9 9 * 4 2 7 #
Change LCD contrast: * # 8 9 9 9 * 5 2 3 #
Jig detect: * # 8 9 9 9 * 5 4 4 #
Memory status: * # 8 9 9 9 * 6 3 6 #
SIM File Size: * # 8 9 9 9 * 7 4 6 #
SIM Service Table: * # 8 9 9 9 * 7 7 8 #
RTK (Run Time Kernel) errors: * # 8 9 9 9 * 7 8 5 #
Run, Last UP, Last DOWN: * # 8 9 9 9 * 7 8 6 #
Software Version: * # 8 9 9 9 * 8 3 7 #
Test Vibrator: * # 8 9 9 9 * 8 4 2 #
Vocoder Reg: * # 8 9 9 9 * 8 6 2 #
Diag: * # 8 9 9 9 * 8 7 2 #
Reset On Fatal Error: * # 8 9 9 9 * 9 4 7 #
Last/Chk: * # 8 9 9 9 * 9 9 9 #9 9 * 9 9 9 #

===

Samsung SGH-2100/600

*#06# Displays IMEI
*#9999# Software version
*#0324# Technical menu
*#0523# Lets you adjust the screen contrast
*#0228# Battery status (capacity, voltage, temperature

===

IMEI number:
*#06#
Code to lock keys. Press together *7
Note: [] (pause) means the * key held in until box appears.
Select phone line - (use this to write things below the provider name):
[] [] [] 0 0 8 [] 1 []
Add phonebook to main menu:
[] [] [] 1 0 5 [] 1 []
Add messages to main menu:
[] [...]

===

Sony Ericsson Secret Menu: -> * <- <- * <- *
(-> means press joystick, arrow keys or jogdial to the right and <- means left.)
You'll see phone model, software info, IMEI, configuration info, sim lock status, REAL time clock, total call time and text labels.
You can also test your phones services and hardware from this [...]

IMEI number: * # 0 6 #
Software version: > * < < * < *
Default Language: < 0 0 0 0 >
Enter to phone menu without SimCard - after Wrong PIN: press NO: * * 0 4 * 0 0 0 0 * 0 0 0 0 * 0 0 0 0 #
Information about SIMLOCK: < * * <

===

On the main screen type
*#06# for checking the IMEI (International Mobile Equipment Identity).
*#7780# reset to factory settings.
*#67705646# This will clear the LCD display(operator logo).
*#0000# To view software version.
*#2820# Bluetooth device address.
*#746025625# Sim clock allowed status.
*#62209526# - Display the MAC address of the WLAN adapter. This is available only in the newer devices that supports WLAN [...]

===

IMEI number: * # 0 6 #
Software version: * # 0 0 0 0 #
Lub * # 9 9 9 9 #
Simlock info: * # 9 2 7 0 2 6 8 9 #
Enhanced Full Rate: * 3 3 7 0 # [ # 3 3 7 0 # off]
Half Rate: * 4 7 2 0 #
Provider lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 1
Network lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 2
Provider lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 3
SimCard lock status: # p w + 1 2 3 4 5 6 7 8 9 0 + 4 1234567890 -
MasterCode which is generated from IMEI *#92702689# [*#war0anty#] Warranty code

===

More of nokia

On the main screen type

*#06# for checking the IMEI (International Mobile Equipment Identity).

*#7780# reset to factory settings.

*#67705646# This will clear the LCD display(operator logo).

*#0000# To view software version.

*#2820# Bluetooth device address.

*#746025625# Sim clock allowed status.

*#62209526# - Display the MAC address of the WLAN adapter. This is available only in the newer devices that supports WLAN like N80

#pw+1234567890+1# Shows if sim have restrictions.

*#92702689# - takes you to a secret menu where you may find some of the information below:

1. Displays Serial Number.

2. Displays the Month and Year of Manufacture

3. Displays (if there) the date where the phone was purchased (MMYY)

4. Displays the date of the last repair - if found (0000)

5. Shows life timer of phone (time passes since last start)

*#3370# - Enhanced Full Rate Codec (EFR) activation. Increase signal strength, better signal reception. It also help if u want to use GPRS and the service is not responding or too slow. Phone battery will drain faster though.

*#3370* - (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.

*#4720# - Half Rate Codec activation.

*#4720* - Half Rate Codec deactivation. The phone will automatically restart

If you forgot wallet code for Nokia S60 phone, use this code reset: *#7370925538#
Note, your data in the wallet will be erased. Phone will ask you the lock code. Default lock code is: 12345

Press *#3925538# to delete the contents and code of wallet.

*#7328748263373738# resets security code.

Default security code is 12345

Unlock service provider: Insert sim, turn phone on and press vol up(arrow keys) for 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin#

Change closed caller group (settings >security settings>user groups) to 00000 and ure phone will sound the message tone when you are near a radar speed trap. Setting it to 500 will cause your phone 2 set off security alarms at shop exits, gr8 for practical jokes! (works with some of the Nokia phones.)

Press and hold "0″ on the main screen to open wap browser.

===

IMEI number
*#06#
Software Version
*#0000#

===

secret iPhone codes

*#06# Displays your IMEI. No need to tap Call.IMEI is the unique identifier for your cell phone hardware. Together with your SIM information it identifies you to the provider network.

*777# and tap Call. Account balance for prepaid iPhone.

*225# and tap Call. Bill Balance. (Postpaid only)

*646# and tap Call. Check minutes. (Postpaid only)These three are pretty self explanatory.

*#21# and tap Call. Setting interrogation for call forwards.Discover the settings for your call forwarding. You'll see whether you have voice, data, fax, sms, sync, async, packet access, and pad access call forwarding enabled or disabled.

*#30# and tap Call. Calling line presentation check.This displays whether you have enabled or disabled the presentation of the calling line, presumably the number of the party placing the call.

*#76# and tap Call. Check whether the connected line presentation is enabled or not.State whether the connected line presentation is enabled or disabled. Presumably similar to the calling line presentation.

*#43# and tap Call. Determine if call waiting is enabled.Displays call waiting status for voice, data, fax, sms, sync data, async data, packet access and pad access. Each item is either enabled or disabled.

*#61# and tap Call. Check the number for unanswered calls.Show the number for voice call forwarding when a call is unanswered. Also show the options for data, fax, sms, sync, async, packet access and pad access.

*#62# and tap Call. Check the number for call forwarding if no service is available.Just like the previous, except for no-service rather than no-answer situations.

*#67# and tap Call. Check the number for call forwarding when the iPhone is busy.And again, but for when the iPhone is busy.

*#33# and tap Call. Check for call control bars.Check all the usual suspects (voice, data, fax, sms, etc) to see whether barring is enabled or disabled for outgoing.

===

IMEI number: * # 0 6 #
Software version: * # 0 6 #
Net Monitor: 0 0 0 0 0 0 *

===

IMEI number: * # 0 6 #
Default Language: * # 0 0 0 0 #
Net Monitor: * # 3 2 6 2 2 5 5 * 8 3 7 8 # #

===

IMEI number: * # 0 6 #
Software version: * # 9 9 9 9 #
SIM card serial number: * # 9 9 9 4 #
Information about battery status: * # 9 9 9 0 #
Selftest (only Dancall HP2731): * # 9 9 9 7 #
Show version configuration: * # 9 9 9 8 #
Net Monitor: * # 9 9 9 3 #

===

IMEI number: * # 0 6 #
Simlock info: * # 8 3 7 7 #
Security code: * # 1 2 3 4 # (Fizz) or * # 7 4 8 9 #

===

Sagem

IMEI number: * # 0 6 #
Service Menu access: MENU 5 1 1 #