User manual

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Verify apps
Some apps can harm your phone. You can choose to verify apps in order to
help prevent harmful software from being installed on your phone.
Back up and reset your phone
Go to Settings > Backup & reset.
Back up my data
Select this option to back up your app data, WLAN passwords, and other
settings to Google servers.
Backup account
Specify a Google account you added on your phone as your backup account.
We strongly recommend not selecting the Unknown sources option. Apps from
sources other than Play Store may contain malicious content to harm your phone
or steal your personal data.