1. WPCentral Question's Avatar
    If I am in a somewhat long phone call the touch screen stops working. When I complete the call nothing on the touch screen works and I am force to reset the machine. Does somebody know if this a problem with Lumia 640 on windows 10?
    08-03-2015 07:01 PM
  2. Tharun Boppana's Avatar
    I too am using Lumia 640 and had the same problem. Unable to solve it, I have reverted back to 8.1. So sad.
    08-08-2015 02:55 AM

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