| *#*#4636#*#* | Displays information about Phone Battery and Usage statistics |
| *#*#7780#*#* | Resets your phone to factory state – only deletes application data and applications |
| *2767*3855# | 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 |
| *#*#273283*255*663282*#*#* | 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!