Hard Reset HUAWEI UM840

Second method:

  1. Power on your device.
    Hard Reset HUAWEI UM840
  2. Next from the Home screen select Menu.
  3. Now choose Settings -> Back up and reset -> Reset device -> Delete all.
  4. Confirm all informations, and wait until your phone will reset and reboots.
  5. Success!
See the First Method!

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