Android: 'Secret' Service Codes

##4636##	Displays information about Phone Battery and Usage statistics
##7780##	Resets your phone to factory state – only deletes application data and applications
27673855#	Wipes the handset and re-installs firmware
##34971539##	Displaysinformation about the camera
##7594##	Changes the power button behavior – enables direct power-off once the code is enabled
##273283255663282##*	Backs up all media files
##197328640##	Enables test mode for service activity
##232339## or ##526## or ##528##	Wireless Lan Tests
##232338##	Displays Wi-Fi Mac-address
##1472365##	Quick GPS test
##1575##	A different type of GPS test
##0283##	Packet Loopback test
##0##*	LCD display test
##0673## or ##0289##	Audio test
##0842##	Vibration and Backlight test
##2663##	Displays touch-screen version
##2664##	Touch-Screen test
##0588##	Proximity sensor test
##3264##	Ram version
##232331##	Bluetooth test
##7262626##	Field test
##232337#*#	Displays bluetooth device address

If anyone has any more, please let me know and I’ll add them to the list!

Android: ‘Secret’ Service Codes