Baked deep into Android is a bunch of secret codes that will enable of a variety of statistics and settings on your device that you probably didn’t know existed, as well as some diagnostic tests you can perform on the hardware.
These settings are not enabled by default, and that’s for a reason. Take care when using these and we’re not responsible if you mess your device up.
1. Get information from your phone and battery, including usage and statistics.
*#*#4636#*#*2. Factory format your device
*2767*3855#3. Get information your camera
*#*#34971539#*#*4. Open a file copy screen to backup your media
*#*#273283*255*663282*#*#*5. Enter service mode
*#*#197328640#*#*6. Perform various tests on your device
*#*#232339#*#*- WLAN testDrop us a comment in the section below if you found out any useful information about your device that you didn’t know before by using these codes.
*#*#232338#*#* - Shows WiFi MAC address
*#*#1472365#*#* - GPS test
*#*#1575#*#* - Another GPS test
*#*#232331#*#* - Bluetooth test
*#*#2664#*#* – Touch screen test