Sony Xperia Z - Restarting and resetting your device

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Restarting and resetting your device

You can force your device to restart or shut down in situations where 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 have to 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 135 .

If your device fails to power 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™ Companion, see

Computer tool


Your device may fail to restart if the battery level is low. Connect your device to a charger and

try restarting again.

If you are using 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 force your device to restart


Press and hold down the power key .


In the menu that opens, tap

Restart. The device restarts automatically.

To force the device to shut down


Press and hold down both the volume up key and the power key for 10



After your device vibrates, release the keys. The device turns off automatically.

To perform a factory data reset

To avoid permanent damage to your device, do not restart your device while a reset procedure

is underway.


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



From your Home screen, tap .


Find and tap

Settings > Backup & reset > Factory data reset.


To delete information, such as pictures and music, from your internal storage,

mark the

Erase internal storage checkbox.



Reset phone.


If required, draw your screen unlock pattern, or enter your screen unlock

password or PIN to continue.


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 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.


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To repair the device software using Xperia™ Companion

Before performing a software repair, make sure you know your Google™ credentials.

Depending on your security settings, you may need to enter them in order to start up the

device after a software repair.


Make sure that Xperia™ Companion for Windows

( ) or Xperia™

Companion for Mac OS

( ) is installed on
your PC or Mac




Connect your device to the computer using a USB cable.


Open the Xperia™ Companion software on the computer if it is not

automatically launched and select

Software repair on the screen.


Follow the on-screen instructions to reinstall the software and complete the