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1. *#*#4636#*#*
This code can be used to get some interesting information about your phone and battery. It shows following 4 menus on screen:

* Phone information
* Battery information
* Battery history
* Usage statistics


2. *#*#7780#*#*
This code can be used for a factory data reset. It’ll remove following things:

* Google account settings stored in your phone
* System and application data and settings
* Downloaded applications

It’ll NOT remove:

* Current system software and bundled applications
* SD card files e.g. photos, music files, etc.

Note :-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.


3. *2767*3855#
Think 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.

Note:- 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.


4. *#*#34971539#*#*
This code is used to get information about phone camera. It shows following 4 menus:

* Update camera firmware in image (Don’t try this option)
* Update camera firmware in SD card
* Get camera firmware version
* Get firmware update counter

Note:- 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.


5. *#*#7594#*#*
This one is my favorite one. 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.


6. *#*#273283*255*663282*#*#*
This code opens a File copy screen where you can backup your media files e.g. Images, Sound, Video and Voice memo.


7. *#*#197328640#*#*
This code can be used to enter into Service mode. You can run various tests and change settings in the service mode.


8. *#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#*
WLAN test (Use “Menu” button to start various tests)


9. *#*#232338#*#*
Shows WiFi MAC address


10. *#*#1472365#*#*
GPS test


11. *#*#1575#*#*
Another GPS test


12. *#*#232331#*#*
Bluetooth test


13. *#*#232337#*#
Shows Bluetooth device address


14. *#*#8255#*#*
This code can be used to launch GTalk Service Monitor.


15. Codes to get Firmware version information:

*#*#4986*2650468#*#* – PDA, Phone, H/W, RFCallDate

*#*#1234#*#* – PDA and Phone

*#*#1111#*#* – FTA SW Version

*#*#2222#*#* – FTA HW Version

*#*#44336#*#* – PDA, Phone, CSC, Build Time, Changelist number


16. Codes to launch various Factory Tests:

*#*#0283#*#* – Packet Loopback

*#*#0*#*#* – LCD test

*#*#0673#*#* OR *#*#0289#*#* – Melody test

*#*#0842#*#* – Device test (Vibration test and BackLight test)

*#*#2663#*#* – Touch screen version

*#*#2664#*#* – Touch screen test

*#*#0588#*#* – Proximity sensor test

*#*#3264#*#* – RAM version

Now I’ll reveal 3 hidden modes in the phone:

* Fast Boot mode
* Download mode
* Recovery mode

WARNING: All these modes are used to flash/reset phone firmware. Think twice before entering in these modes.


17. Fast Boot Mode
* Power off your phone.
* Press and hold Call and End Call/Power keys.

This mode is used to flash the phone firmware using command line tools.


18. Download Mode
* Power off your phone.
* Press and hold Volume Down, OK and End Call/Power keys.

This mode is also used to flash the phone firmware. Mostly this mode is used by GUI tools for easier and quicker flashing.


19. Recovery Mode
* Power off your phone.
* Press and hold Volume Down, Call and End Call/Power keys.

This mode is used for recovery purposes like to reset the phone firmware

Note:- Once the alert triangle is shown on screen, press “Menu” key to reset the firmware or press “Home” and “End Call/Power” keys to show recovery menu.

 

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