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Xiaomi Proximity sensor Calibration failure Test Panel

  • Enter test panel:
    • On dial-pad enter: * # * # 64663 # * # *
    • You will see "Hardware tests" screen.
  • Calibrate Proximity sensor
    • Select "9. Proximity sensor"
    • Click on Calibrate few times till you will get PASS result.
    • Click on home button
  • Based on the following post.