Learn how to restart your Sony Xperia Z Ultra. You can reset your device to its original factory settings, with or without deleting all of your personal data. This action is sometimes necessary if your device stops functioning properly. You can also force your device to shut down in situations where it hangs or won’t restart normally. When you restart a device after forcing it to shut down, no settings or personal data get deleted.
Note: Before you perform a reset, make sure to back up any important data saved on your device.
Note: Do not use overly sharp objects that could damage the OFF button.