Android Secret Codes

1. *#*#4636#*#* to get Phone information, Battery information, Battery history, Usage Statics.
2. *#*#7780#*#* for the factory data reset when you enter this code you can promote on the asking for reset your phone so there is chance to cancel it. reset phone remove your google account setting stored and setting download application.it can not remove current sysytem software and bundled application and sd card files..
3. *2767*3855# this code use for factory format. it can remove all files and setting including the internal memory. it also reinstall the phone firmware. once you enter this code there is no chance to cancel .so think after apply this code.
4.  *#*#34971539#*#* this code give you camera Information . When you enter this code you will get this option 

           Update camera firmware in sd card (Don't try this Option)
           Get camera firmware version
           Get firmware update count. 
           Warning : Don't try first option otherwise camera will stop working and need to take service center for  reinstall                    camera firmware.
     5. *#*#7594#*#* this code is used for change" power /end call" button acting on your phone.You need to long press           power button to power off and other option so you can enable direct power off  button don't waste your time.
     6.*#273283*255*663282*#*#* this code use for open file copy screen where you can backup your media files e.x            images ,videos,voice memo.
     7.*#197328640#*#* this code use for enter in service mode.
     8. *#232339#*#* OR *#526#*#* OR *#528#*#* for Wlan test select Menu button for various Test.
     9. *#232338#*#* which shows wifi Mac address.
     10.*#1472365#*#* use for gps test.
     11. *#1575#*#* another gps test.
     12. *#232331#*#* use for Bluetooth test.
     13. *#232337#*# use for Bluetooth device address.
     14. *#*#8255#*#* this code use for launch Gtalk Service.
     15.  *#*#4986*2650468#*#* use for firmvare Version of PDA, Phone.H/W,RFcall date.
     16.   *#*#1234#*#* use for firmvare Version PDA and Phone.
     17.  *#*#1111#*#* use for firmvare Version FTA SW Version.
     18.  *#*#2222#*#* use for firmvare Version FTA HW Version
.    19.  *#*#44336#*#* use for firmvare Version PDA,Phone.CSC, Build time.
     20.  *#*#0283#*#* use for test Packet loopback.
     21. *#*#0#*#* use for test LCD Test.
     22. *#*#0673#*#* OR *#*#0289#*#* use for test melody test.
     23. *#*#0842#*#* use for test Vibration test and backlight test.
     24.  *#*#2663#*#* use for test toch screen version.
     25.  *#*#2664#*#* use for test Touch screen test.
     26.  *#*#0588#*#* use for test Proximity test.
     27.  *#*#3264#*#* use for test for ram Version.