Android secret codes and hacks are fun and even useful if you need to troubleshoot some problems on your phone, but they are not as impressive at most other phones since the phones can already do pretty much everything but there are still some codes which are not always general knowledge. I am posting all the working codes.
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#*#*
