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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.
1
Press and hold down the power key .
2
In the menu that opens, tap Restart. The device restarts automatically.
To Force the Device to Restart or Shut Down
1
Press and hold down the power key
and the volume up key at the same time
for 10 seconds.
2
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 keys at this point. The
device restarts.
•
If you wish to force shut down the device: Continue pressing the keys. 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.
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
From your Home screen, tap .
3
Find and tap
Settings
>
Backup & reset
>
Factory data reset
.
4
Tap Reset phone.
5
If required, draw your screen unlock pattern or enter your screen unlock password
or PIN to continue.
6
To confirm, tap
Erase everything
.
Your device does not revert to an earlier software version of Android™ when you perform a
factory data reset.
Repairing the Device Software
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.
If you can’t turn off your device before performing a software repair, force it to shut down.
When you receive a new Google™ account username or password, you might not be able to
use them to log in to and recover your device for 72 hours.
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
steps below:
1
Make sure Xperia™ Companion is installed on your PC or Mac
®
.
2
Open the Xperia™ Companion software on the computer and click on Software
repair on the main screen.
3
Follow the instructions that appear on the screen to reinstall the software and
complete the repair.
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