Sony Xperia Secret Menu for Service Test and Hard Reset

In Xperia series phones of Sony, there is a secret menu which has options for Service test and Hard reset of the phone. This menu is available almost all Xperia phones including Xperia Z, Xperia J, Xperia P, Xperia U, Xperia ION, Xperia S,Xperia E, Xperia L, Xperia tipo, Xperia arc, Xperia zola The menu can be made available by dialing a secret code in the dial-pad of the phone.

Dial pad of Sony Xperia P

The code is *#*#7378423#*#*. When you dial this code in the dialpad, the secret menu will appear which contains options:

1. Service Info
2. Service Settings
3. Service Tests
4. Customisation Settings