Restarting, Resetting, and Repairing
You can force your device to restart or shut down if it stops responding or won't restart
normally. No settings or personal data get deleted.
You can also reset your device to its original factory settings. This action is sometimes
necessary if your device stops functioning properly, but note that if you want to keep any
important data, you should first back up this data to a memory card or other non-internal
memory. For more information, see
Backing Up and Restoring Content
on page 38.
If your device fails to turn on or you want to reset your device’s software, you can use
Xperia™ Companion to repair your device. For more information on using Xperia™
on page 36.
If you are sharing a device with multiple users, you may need to log in as the owner, that is,
the primary user, to reset your device to its original factory settings.
To Restart Your Device
Your device may fail to restart if the battery level is low. Connect your device to a charger and
try restarting again.
Press and hold down the power key .
In the menu that opens, tap
Restart. The device restarts automatically.
To force the device to restart or shut down
Press and hold down the power key and the volume up key at the same time
for 10 seconds.
Your device vibrates once. Depending on whether you wish to force the device to
restart or shut down, proceed as follows.
If you wish to force restart the device: Release the buttons at this point. The
If you wish to force shut down the device: Continue pressing the buttons. After
a few more seconds, the device vibrates three times and turns off.
To Perform a Factory Data Reset
To avoid permanent damage to your device, do not interrupt a factory data reset procedure.
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.
Home screen, tap .
Find and tap
Settings > Backup & reset > Factory data reset.
If required, draw your screen unlock pattern or enter your screen unlock password
or PIN to continue.
To confirm, tap
Your device does not revert to an earlier software version of Android™ when you perform a
factory data reset.
To Repair the Device Software Using Xperia™ Companion
Before performing a software repair, 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.
If your device seems to have frozen, restarts repeatedly or doesn’t start at all after you
updated the Xperia™ software or after you performed a software repair or a factory data
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reset, try forcing the device to shut down then try turning it back on. If the problem still
exists, force the device to shut down then perform a software repair by following the
Make sure Xperia™ Companion is installed on your PC or Mac
Open the Xperia™ Companion software on the computer and click on
repair on the main screen.
Follow the instructions that appear on the screen to reinstall the software and
complete the repair.