How to Hard Reset on Doogee S40 S?

  1. Make sure you turned off the device.

    Hard Reset keys Doogee S40 S

  2. Hold down the Volume Up key and the Power button.
  3. When the Boot Mode appears, release the keys.
  4. Open the Recovery Mode using the Volume keys.
  5. Then hold down the Power button and press the Volume Up key.
  6. Next select «wipe data/factory reset» using the Volume keys and the Power button.

    Android system recovery Doogee S40 S

  7. Choose «yes» using the same keys.
  8. Press «reboot system now» to finish the process.
  9. That's all! After these actions, your device data will be deleted.

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