iPhone 6 ghost touches/multiple faulty displays
tl;dr - I have had multiple faulty screens and I’m not sure if it’s my fault, or something is wrong with the phone, or if the supplier is bad.
A few weeks ago I dropped my iPhone 6 and smashed the screen. Therefore, I bought a replacement display ("Replacement For iPhone 6 - LCD Screen Assembly - Black - Premium Quality" from iParts4u) and tested and fitted it soon after.
However, this replacement had a fault which was that a vertical strip along the right hand edge of the screen did not respond to touch, as well as a square in the top right hand corner. I then returned this screen for a replacement.
The second screen they provided to me I tested without fitting, and also had a fault which was that the screen had vertical lines on it and kept dying/dimming to black, so I returned that one also.
They later told me that they couldn't find an issue with the first screen but the second one was cracked and this may have happened during transit.
I am now on to my third screen, and whilst this initially seemed to work ok, it has developed a phantom clicking problem, whereby random things on the screen will be touched/clicked when I clearly didn’t click them. In addition, the touch/digitiser sometimes stop working altogether (may be because the phone thinks it is already being touched somewhere else, so will not allow a second gesture).
This can be temporarily solved by locking and unlocking the phone. This also seems to happen in the areas where there is finger grease on the screen, but when I wear touch sensitive gloves and use the phone the issue still happens occasionally.
This leads me to one of three conclusions:
- My installation method is wrong and/or is damaging the screens. However, given that the OEM screen’s touch still works fine every time I re-connect it, this seems unlikely. I also made sure to follow the iFixit guide, including being careful about things like keeping screws in the right positions to avoid long screw damage, as well as working on a grounded anti-static mat and wearing a grounding strap attached to that at all times.
- There is something faulty with the phone itself, such as a bad touch IC that was damaged during dropping the phone. Alternatively, screens 1 and 3 could be shorting on something when they are fitted to the phone, which wouldn’t have shown up during the dry run. But again, why wouldn’t the OEM screen also be affected by either of these issues?
- The supplier is consistently giving me faulty screens and I should switch.
I have now filed for another replacement and whilst the supplier have agreed, they have mentioned that this grade of screen has less than a 1% failure rate, so getting 3 in a row that are faulty seems very unlikely.
If this is my fault or the phone is faulty, then I’d rather not waste their time asking for more replacements, but if they are sending me faulty goods then I should switch.
Does anyone know which of the three above faults might be causing this, and/or have any experience with this supplier?
Thanks in advance.
Edit: Attached some pictures of the two screens/LCD shield for context in a comment - iParts screen is on the left of the image, smashed OEM is on the right.