The bottom of touch screen unresponsive

Only one way to find out, open it up and try to reconnect it. Most likely the touch IC/disease issue though, if it is flickering grey bars as well

"Guys i have found the solution for bottom screen not working in Iphone6.

go to setting first activate ""assistiveTouch"" and select ""Pinch"" by Pinch you can use bottom screen but not easily.

to make it easy go to ""Setting"" than ""Display & Brightness:"" than ""View"" selected ""Zoomed""

by selecting and ""OK"" once its done screeen will restart in 30 seconds.

Now Enjoy now you can use your full screen bottom screen.

Solution provided by Asif Hussain (I am not technical guy but I find solution of my problem my own by keep trying) hope it will help full for others as well."

I think this is most probably a parts' problem. iPhone 6 (6+ is a bit different) touch disease is typically intermittent touch that eventually stops working completely. I've seen cases where areas of the screen would not work using known good screens, but in this case it is not established that they're using a known good screen. There is actually more evidence pointing at a cheap or defective screen that flickers.

I had this problem with a iphone 6 .. it had a copy third party replacement screen on it and the person said the bottom of the screen was unresponsive so i tried a few spare screens i had (original apple and they worked fine) , but once I I tried copy replacement screens and the screen worked fine accept the whole button sections of the phone where you swipe up for the control center didnt work, also in call section i could not tap " favourites" "recents" all the way to voicemail.. i fixed the issue by updating from 11.1 to 11.2 or the newest software out and it fixed the issue for replacement screens so i could use them again.

Cannot back up, or get into iTunes as I cannot get past “agree” to terms of use, due to bottom of screen not working. Also cannot get to settings and can’t Restore iphone6 as to do this, I need to turn off “ find my iPhone”, but can’t get to settings to do this…..

Factory reset your iPhone but this will be your last resort. Performing this method will not only require more time but also wipes your iPhone data while restoring it to factory default settings. Therefore, it eliminates the likelihood about the screen problem being caused by corrupted software.