Sony Xperia XZ1 Manual page 2


Update your device to ensure that you have optimal performance and the latest
enhancements.
Reset

Perform a factory data reset. This is sometimes the best solution if your device stops
functioning properly. Make sure that you know your Google™ account username and
password before you start.
To perform a factory data reset
To avoid permanent damage to your device, do not interrupt a factory data reset
procedure.
1. Back up any important data that is saved on the internal memory of your device
to a memory card or other non-internal memory. If you have any encrypted files
stored on an SD card, you should also remove the encryption to ensure you can
still access them after the reset.
2. Find and tap Settings > System > reset.
3. Tap Factory data reset > Reset phone.
4. If required, draw your screen unlock pattern or enter your screen unlock
password or PIN to continue.
5. To confirm, tap Erase everything.
Your device does not revert to an earlier software version of Android when you
perform a factory data reset.

If you can't access the Settings menu on your device, perform a software repair with the
Xperia™ Companion computer application. You can perform a software repair even if
your device seems totally unresponsive.
To repair the device software using Xperia™ Companion
If possible, you should always back up all personal data before performing a
software repair. All data in the internal memory is overwritten during a software
repair. Content on an external SD card is kept.
1. Make sure you know your Google™ account username and password. Depending
on your security settings, you may need to enter them in order to restart the
device after a software repair
Read about how to update and find latest software version.