Xiaomi Proximity sensor Calibration failure Test Panel

Calibration

• Enter test panel:
  • On dial-pad enter: 
    • * # * # 64663 # * # *
      • or
    • * # * # 6484 # * # *
  • 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.

Enable / Disable proximity Sensor

• Settings->search “incoming call settings”->Proximity sensor->disable