Android is among the smartest phone in this days bt most of the users of Android are not aware about the secret code of that phone..
CAUTION: Use all these codes at your own risk, So if you got any type of damage we will not be responsible for that. So keep that at the back of your Mind. SO BEWARE...
*#06# �C Display's IMEI number.
*2767*3855# �C This code will
Format your device to factory state
(will delete everything on phone).
*#*#4636#*#* �C Display's Phone
information, usage statistics and battery.
*#*#273282*255*663282*#*#* �C
This code will Immediately
backup of all media files.
*#*#197328640#*#* �C This code
will Enable test mode for service. ?
*#*#1111#*#* �C Will display FTA
software version.
*#*#1234#*#* �C Will show PDA
and firmware version.
*#*#232339#*#* �C Wireless LAN tests.
*#*#0842#*#* �C This code is used
for Backlight/vibration test.
*#12580*369# �C Display's
Software and hardware info.
*#*#2664#*#* �C This code is used for Testing the touch screen.
*#9900# �C System dump mode.
*#9090# �C Diagnostic
configuration.
*#*#34971539#*#* �C Will display
Detailed camera information.
*#872564# �C USB logging
control.
*#301279# �C HSDPA/HSUPA
Control Menu.
*#7465625# �C This code will
display phone's lock status.
*#0*# �C Enter the service menu
on newer phones like Galaxy S III.
*#*#7780#*#* �C Reset the /data
partition to factory state.
BASIC CODES
*#*#7780#*#* - This code is used
for factory restore setting. This
will remove Google account
setting and System and
application data and settings.
*2767*3855# - This is for hard restore factory setting, and this will remove
all files and settings including
the internal memory storage. It
will also re install the firmware.
WAIT THERE IS MORE...
*#*#4636#*#* - This is for show
information about your phone and battery.
*#*#273283*255*663282*#*#* - This
will opens a File copy screen
where you can backup your media
files e.g. Images, Sound, Video
and Voice memo.
*#*#197328640#*#* - This also can
be used to enter into Service mode.
You can run various tests and
change settings in the service
mode.
*#*#7594#*#* - This will enable your "End call / Power" button
into direct power off button
without asking for selecting any
option(silent mode, aero plane
and power-off).
*#*#8255#*#* - This code can be used to launch G Talk Service
Monitor.
*#*#34971539#*#* - This is also
used to get camera information.
Please avoid update camera
firmware option.
W-LAN, GPS and Bluetooth Test Codes:
*#*#232339#*#* OR *#*#526#*#*
OR *#*#528#*#* - W-LAN test (Use
Menu button to start various
tests).
*#*#232338#*#* - Shows WiFi MAC
address.
*#*#1472365#*#* - GPS test.
*#*#1575#*#* - Another GPS test.
*#*#232331#*#* - Bluetooth test.
*#*#232337#*# - Shows Bluetooth
device address.
Codes to launch various Factory Tests:
*#*#0842#*#* - Device test
(Vibration test and BackLight test)
.
*#*#0588#*#* - Proximity sensor
test.
*#*#0*#*#* - LCD test.
*#*#2664#*#* - Touch screen test.
*#*#2663#*#* - Touch screen
version.
*#*#0283#*#* - Packet Loopback.
*#*#0673#*#* OR *#*#0289#*#* -
Melody test.
*#*#3264#*#* - RAM version.
Code for firmware
Code for firmware version information:
*#*#1111#*#* - FTA SW Version.
*#*#2222#*#* - FTA HW Version.
*#*#44336#*#* - PDA, Phone, CSC,
Build Time, Change list number.
*#*#4986*2650468#*#* - PDA,
Phone, H/W, RFCallDate.
*#*#1234#*#* - PDA and Phone.
I hope this will help, if Yes kindly coment bellow and also hit the share botton
