Sony Xperia Z Ultra - 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


page 131 .
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.


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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


Detach the cover for the memory card slot and micro SIM card holder.


Using the tip of a pen or a similar object, press and hold down the OFF button.


After your device emits a series of quick vibrations, release the OFF button. The

device turns off automatically.

Do not use overly sharp objects that could damage the OFF button.

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 memory.


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.

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 is installed on your PC or Mac




Open the Xperia™ Companion software on the computer and press


repair on the main screen.


Follow the instructions that appear on the screen to reinstall the software and

complete the repair.


This is an Internet version of this publication. © Print only for private use.