Secret codes for Android mobile operating system:
Phone and Battery information Code: *#*#4636#*#*
Factory Data reset Code: *#*#7780#*#*
Full Factory Format Code: *2767*3855# (Dangerous)
GTalk Service Monitor Code: *#*#8255#*#*
Camera Firmware settings Code: *#*#34971539#*#*
Service mode Codes:
*#*#197328640#*#*
This code can be used to enter into Service mode. You can run various tests and change settings in the service mode.
WLAN, GPS and Bluetooth Test Codes:
WLAN test (Use "Menu" button to start various tests) : *#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#*