I have a 6 plus that has been suffering 'touch disease' for several months
Got a hand me down iPhone 5 with severe cracks and non functioning screen, but plugged it in and recognized as working
Had some trouble getting the screen off because the digitizer and the glass had becom separated so prying it up didn't work as expected. Took a bit more finagling and eventually just more brute force than I would have thought to unlatch it!
Otherwise went pretty smoothly all working well.
New screen and battery
Same old beat up and cracked back case
Grateful to have a phone with a working touchscreen!!!
Back to An iPhone 5 after 2.5 years with a 6 Plus is interesting
Totally worth it. I'll wait for a while on any other upgrade or replacements.