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Okay so this issue seems to be pretty unique because i looked through all the questions here and I did not find anything but I work in a Phone repair place and I encounter this pretty often. Iphone 6 lightly bent frame on the top right corner. The screen does not swipe sometimes. There are small thick lines only on the top of the screen (flickering). Once i put pressure on the frame on the top right corner screen seems to start work again when I let go this flickering starts again and screen has issues again. I would really appreciate if someone can give me an answer on that! *checked multiple screens, sure it is not long screw issue (no screws installed), encounter this on multiple phones, Apple used to replace those but nowadays the manufactured warranty is expired! Thank You!
This is a belated answer so hopefully it can be of use to folks who search for and find this question. Touch Disease is a common failure on the iPhone 6 Plus. At first, the phone will typically develop intermittent touch control failure. For some phones, a gray/white bar starts appearing at the top of the screen. Twisting and applying pressure in certain spots sometimes allows touch control to work for a short period of time, but eventually, the touch interface ceases to function entirely. This is colloquially known as Touch Disease. You can look at my profile for a link to a blog article on Touch Disease or search the web for more info.
