2. Press the 2 buttons Volume up and Power at the same time for a few seconds
3. Hold down the keys until the Boot Mode menu appears
4. You need to go to the Recovery menu line. The Volume up key can be used to navigate and the Volume Down key to confirm the selection
5. Press the Volume Up and Power keys at the same time when the Android Robot logotype appears on the screen
6. You must select the "wipe data / factory reset" item, the Volume Up / Down keys are used to navigate the menu, and the Power key to confirm the selection
7. Select "yes" and confirm by pressing the Power button
8. In the menu, go to "reboot system now"
9. Factory data reset completed
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