Microsoft Lumia 640 XL - Perform a master reset via hardware

 

Perform a Master Reset via Hardware

  1. With the device switched off, press and hold the Power button until the device vibrates, then release.
  2. Press and hold the Volume Down button, then release it when the exclamation mark comes up on the screen.
  3. Enter this button combination: 
    • Volume Up
    • Volume Down
    • Power
    • Volume Down
The device will reset and will boot up automatically. This might take a several minutes.

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