It’s a logic board problem, but there is a 100% Permanent Fix
If you have an iPhone 6 Plus, it is very common for touch to stop working randomly. Even with a new screen, there will be no touch. This could also happen on iPhone 6 but not as common.
common symptoms:
-Flickering Gray Bar on top
-No touch
-Ghost touching/random touching
-random touching of the screen
How do We fix this:
Touch Disease issue is basically caused to the “M1” connection under the Meson IC Chip.
First, we desolder mason ic chip using a hot air
then we re-create “M1” trace pad that breaks or torn by making a micro jumper
then we reball the chip if still in intact condition or we replace it with a brand new chip and solder it back down on the board.
And Wola! Touch Works and Problem is resolved.