USSD (Unstructured Supplementary Service Data), sometimes known as “quick codes” or “cheat codes”, is a UI protocol, which allows people to access hidden features of android.
The USSD protocol allows you to access hidden features you didn’t know about right from your smartphone’s dialer. But there is some trickiness you’ll need to know about.
33. #43#[dial]Turn off call waiting
| Sr no | Code | Function |
| 1. | *#*#4636#*#* | Display information about Phone, Battery, and Usage statistics |
| 2. | *#*#7780#*#* | Resetting your phone to factory state-Only deleted application data and applications |
| 3. | *2767*3855# | It’s a complete wiping of your mobile also it reinstalls the phones firmware |
| 4. | *#*#34971539#*#* | Shows complete information about the camera |
| 5. | *#*#7594#*#* | Changing the power button behavior-Enables direct power off once the code enabled |
| 6. | *#*#273283*255*663282*#*#* | For a quick backup to all your media files |
| 7. | *#*#197328640#*#* | Enabling test mode for service activity |
| 8. | *#*#232339#*#* OR *#*#526#*#* | Wireless Lan Tests |
| 9. | *#*#232338#*#* | Displays Wi-Fi Mac address |
| 10. | *#*#1472365#*#* | For a quick GPS test |
| 11. | *#*#1575#*#* | A Different type of GPS test |
| 12. | *#*#0283#*#* | Packet Loopback test |
| 13. | *#*#0*#*#* | LCD display test |
| 14. | *#*#0673#*#* OR *#*#0289#*#* | Audio test |
| 15. | *#*#0842#*#* | Vibration and Backlight test |
| 16. | *#*#2663#*#* | Displays touch-screen version |
| 17. | *#*#2664#*#* | Touch-Screen test |
| 18. | *#*#0588#*#* | Proximity sensor test |
| 19. | *#*#3264#*#* | Ram version |
| 20. | *#*#232331#*#* | Bluetooth test |
| 21. | *#*#7262626#*#* | Field test |
| 22. | *#*#232337#*# | Displays Bluetooth device address |
| 23. | *#*#8255#*#* | For Google Talk service monitoring |
| 24. | *#*#4986*2650468#*#* | PDA, Phone, Hardware, RF Call Date firmware info |
| 25. | *#*#1234#*#* | PDA and Phone firmware info |
| 26. | *#*#1111#*#* | FTA Software version |
| 27. | *#*#2222#*#* | FTA Hardware version |
| 28. | *#*#44336#*#* | Displays Build time and change list number |
| 29. | *#06# | Display IMEI number |
| 30. | *#*#8351#*#* | Enables voice dialing logging mode |
| 31. | *#*#8350#*#* | Disables voice dialing logging mode |
| 32. | press 1 for longer than one second | Dial mailbox number (mailbox number must bve specified in the settings) |
| 34. | *#43#[dial] | Show status of call waiting |
| 35. | *#0000# | Display Software Version (Nokia and Samsung devices) |