The problem with unresponsive touch screens on iPhone 6 and 6 Plus models often corresponds with a flickering gray bar across the top of the screen, iFixit reported on its YouTube channel Monday. Repair experts from all over the world are reporting a widespread problem killing iPhone 6 and iPhone 6 Plus devices: an unresponsive touchscreen and a gray, flickering bar at the top of the display. I'm still Android all over. Can't use the I-Phone. Too many flaws.