You can remove all data from your Android One device by resetting it to factory settings, or doing a "force reset." You can do so by either using the Settings menu to erase all your data or by using the Recovery menu.
Important: By performing a factory data reset, all data — like your apps, photos, and music — will be wiped from the device. Any data stored in your Google Account will be restored when you sign in, but all apps and their data will be deleted and cannot be restored. Learn how to back up your data before performing a factory data reset.
Option 1: Erase data using the Settings menu
To perform a factory data reset using the Settings menu, follow these steps: