Sony experia z1 wipe data - Sony Cell Phones

Note that you typically only do a hard reset/ wipe data if you are having issues - this being the last resort, or you are selling your device. If you intend to keep the device, make sure you perform a back up first!

On your phone, - go to settings.- Tap the "backup and restore" option. - Choose "factory data reset" - Up next press on "erase phone" and tap on "erase everything" in order to confirm
or
The Xperia Z1 is coming with an un-removable battery which means that the hard reset button is located somewhere it can be easily accessed.In that matter open the cover of the SD card slot.There should be located a small red button.

1. That is the hard reset key.
2. Now press and hold that small red button for about 3 or 5 seconds.
3. Your Xperia Z1 will be factory reset automatically