Resetting and restarting
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.
Before you perform a reset, make sure to back up any important data saved on your device.
To perform a factory data reset
To avoid permanent damage to your device, do not restart your device while a reset procedure is underway.
1Drag the status bar downwards, then tap 
.
2Find and tap Backup & reset> Factory data reset.
3If you also want to erase data such as pictures and music, which is saved to your device's internal storage, mark the Erase internal storage checkbox.
4Tap Reset phone.
5To confirm, tap Erase everything. To force the device to shut down
1Detach the cover of the micro SIM card slot.
2Using 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.
Battery and power management
Your device has an embedded battery. You can keep track of your battery consumption and see which applications are using most power by checking the battery usage menu. There are several ways to improve battery performance, for example, by using STAMINA mode or Low battery mode.
For more information and tips about how to make the battery last longer, go to www.sonymobile.com/support.
To check the battery level
1From your Home screen, tap 
.
2Find and tap Settings > About phone > Status > Battery level.
To access the battery usage menu
1From your Home screen, tap 
.
2Find and tap Settings > Power management > Battery usage.
Improving battery performance
The following tips can help you improve battery performance:
•Charge your device often. This will not affect the lifetime of the battery.
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