List of secret codes which you can use to enable/disable lots of hidden settings in the mobile phone, these codes can also show many useful information about your phone

Recently I got a Google Android mobile phone. While I'm loving playing with it, I also found some interesting secret codes which can enable/disable lots of hidden settings in the mobile phone. These codes can also show many useful information about the phone

*#*#7780#*#*
NOTE
This code can be used for a factory data reset. It'll remove following things:
1> Google account settings stored in your phone
2> System and application data and settings
3> Downloaded applications
It'll NOT remove:
1> Current system software and bundled applications
2> SD card files e.g. photos, music files, etc.
PS: Once you give this code, you get a prompt screen asking you to click on "Reset phone" button. So you get a chance to cancel your operation.
See the screen short bellow

FOR FACTORY FORMAT
Dial *2767*3855#
NOTE.

You must thinks before you give this code. This code is used for factory format. It'll remove all files and settings including the internal memory storage. It'll also reinstall the phone firmware.
PS: Once you give this code, there is no way to cancel the operation unless you remove the battery from the phone. So think twice before giving this code.
See the screen short bellow

INFORMATION ABOUT PHONE CAMERA
Dial *#*#34971539#*#*
This code is used to get information about phone camera. It shows following 4 menus:
1> Update camera firmware in image (Don't try this option)
2> Update camera firmware in SD card
3> Get camera firmware version
4> Get firmware update count
WARNING: Never use the first option otherwise your phone camera will stop working and you'll need to take your phone to service center to reinstall camera firmware.
See the screen short bellow

POWER BUTTON/END CALL
Dial this code *#*#7594#*#*
This code can be used to change the "End Call / Power" button action in your phone. Be default, if you long press the button, it shows a screen asking you to select any option from Silent mode, Airplane mode and Power off.
You can change this action using this code. You can enable direct power off on this button so you don't need to waste your time in selecting the option.
See the screen short bellow

OPEN FILE COPY
Dial thiscode*#*#273283*255*663282*#*#*
This code can opens a File copy screen where you can backup your media files e.g. Images, Sound, Video and Voice memo.
See the screen Short bellow

SERVICE MODE
Dial this code*#*#197328640#*#*
This code can be used to enter into Service mode. You can run various tests and change settings in the service mode.
See the screen short bellow

WLAN, GPS and Bluetooth Test Codes:
Dial this *#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#* - WLAN test (Use "Menu" button to start various tests)
See the screen short bellow

GPS TEST
Dial this code
*#*#1472365#*#* - GPS test
               Or
*#*#1575#*#* - Another GPS test
See the screen short bellow

BLUETOOTH TEST
Dial this code *#*#232331#*#* - Bluetooth test
See the screen short bellow

TO SHOW BLUETOOTH DEVICE ADDRESS
Dial this code *#*#232337#*#

GTALK SERVICE MONITOR
Dial this code *#*#8255#*#*
This code can be used to launch GTalk Service Monitor.

FIRMWARE VERSION INFORMATION
Codes to getFirmware version information:

*#*#4986*2650468#*#* - PDA, Phone, H/W, ref call date

Dial this code *#*#1234#*#* - PDA and Phone
Or
*#*#1111#*#* - FTA SW Version

*#*#2222#*#* - FTA HW Version

*#*#44336#*#* - PDA, Phone, CSC, Build Time, Change list number

To launch various Factory Tests:
Dial this code *#*#0283#*#* - Packet Loopback
*#*#0*#*#* - LCD test
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