Sony Ericsson Xperia X1 soft reset
Press the RESET button which is located on the back side of the device.
Sony Ericsson Xperia X1 hard reset
- Turn off the phone.
- Hold down LEFT and Right SOFT buttons.
- While holding down both SOFT buttons press POWER button for a few seconds.
- Release POWER button. Then release SOFT keys.
Other method is the same as above, except Press The RESET button while holding down SOFT keys.