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.
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™ Companion, see Xperia™ Companion.
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 shut down
- Detach the SIM and memory card cover.
- Using the tip of a pen or a similar object, press and hold down the OFF button until the device shuts down.
Do not use overly sharp objects that could damage the OFF button.
To perform a factory data reset
- Make a backup of any important data stored on the internal memory to avoid permanent loss during the reset process.
- From your Home screen, tap .
- Find and tap Settings > Backup & reset > Factory data reset.
- Tap Reset phone.
- If required, draw your screen unlock pattern or enter your screen unlock password or PIN to continue.
- To confirm, tap Erase everything.
To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.
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’ve updated the Xperia™ software or after you’ve 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:
- Make sure that Xperia™ Companion is installed on your PC or Mac®.
- Open the Xperia™ Companion software on the computer and click on Software repair on the main screen.
- Follow the instructions that appear on the screen to reinstall the software and complete the repair.