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    Restarting and resetting your device

    Arrow left Xperia E3 Dual support overview

    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.

    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 tools.


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

    To restart your device

    1. Press and hold down the power key Icn sony key and power k90.
    2. In the menu that opens, tap Restart. The device restarts automatically.

    To force the device to shut down

    Forcing Sony Smartphones to shut down
    1. Remove the back cover.
    2. Press and hold down the OFF button using the tip of a pen or a similar object. The device turns off automatically.


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

    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 is underway.

    1. From your Home screen, tap Icn sony home apptray normal.
    2. Find and tap Settings > Backup & reset > Factory data reset.
    3. Tap Reset phone.
    4. If required, draw your screen unlock pattern or enter your screen unlock password or PIN to continue.
    5. 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.

    1. Make sure that Xperia Companion is installed on your PC or Mac®.
    2. Open the Xperia™ Companion software on the computer and press 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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