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 39.
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
Before you start, make sure to back up any important data that is saved on the internal
memory of your device to a memory card or other non-internal memory. Factory data reset will
erase all data from your device’s internal storage, and you will not be able to access the files
on any of your encrypted SD cards again.
To avoid permanent damage to your device, do not restart your device while a reset procedure
From your Homescreen, 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.
If you forget your screen unlock password, PIN or pattern, you can use the device repair
feature in Xperia™ Companion to erase the security layer. You need to provide your Google
account login details to perform this operation. By running the repair feature, you reinstall
software for your device and you may lose some personal data in the process.
This is an internet version of this publication. © Print only for private use.
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
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.