what to do when Redmi Note phone touchscreen fail ?

Why Redmi Note phone touchscreen often fail? 
If screen failure occurs on Redmi Note, you can troubleshoot through the following ways: 
  1.  Phone charging voltage instability or use of non-original charger may cause touchscreen failure, we recommend that you try to use Xiaomi original data cable and charger when charging, and choose a more stable voltage charge; 
  2.  If you have water stains or stains  affecting the touch screen, wipe the screen after use; 
  3. Upgrade your Redmi Note to the latest stable version; 
  4. -On dial interface, enter * # * # 64663 # * # *, enter the hardware detection, select the touch screen test - Menu key - touch screen calibration. 
  5. If you are unable to complete the calibration, it is recommended that you bring the phone to the nearest Xiaomi authorized repair point for testing. 

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