This allows you to open the Xperia's built-in service menu with a single tap instead of entering a long combination of numbers.

The service menu allows you to view device configuration software configuration and to perform tests of the various features available on your device.

FAQ:

1) It says the service menu app was not found on my phone:

- Try rebooting your phone.
- If you are on a custom ROM it might be an issue with that.