After update to iOS 11 Touchscreen unresponsive

We have seen similar issues in the past with aftermarket screens not playing nice with phones during the updating process. At one point we had to install a broken original screen, run the update, then put the new aftermarket back on. This seemed to alleviate the issue. Frustrating but worked at that time. That being said we have not seen anyone with this yet at our shop. You should contact iFixit customer service and see if they have any new recommendations.

"There are quite a few questions on this forum regarding this issue (as well as great answers). Unfortunately for end-users, a lot of the best info is on specialized discussion groups. So I have created a blog post that summarizes the most current and relevant information and I have been updating it almost daily.

The bottom line right now is that the problem is with aftermarket screens produced with Hancai or Tianma LCD's using the Aichungjia (a Flex/IC manufacturer) ""copy"" driver appear to be incompatible with iOS 11. This driver is said to be unable to handle the iOS configuration and therefore shutting down and causing the lack of Touch functionality.

The only real, practical solution right now is to either downgrade to iOS 10 while you still can ( instructions for how to downgrade iOS to 10.3.3 (WikiHow) or install an original/OEM grade replacement screen. I'm confident that the aftermarket screen manufacturers will correct this problem moving forward. In the meantime, contact your local repair shop (or vendor if you repaired it yourself) to see if they can offer you a replacement.

Apple has just released an update to iOS 11. Version 11.0.1 is now available for download. However, Apple does not state what bug fixes were included in this release. It is possible that this will attempt to address the ""Touch not working"" issue as we have learned that Apple engineers were contacting independent repair shops to understand the nature of this problem.

For those that are interested, you can click on my profile for a link to my blog.

EDIT

Update 2017/10/11 - Apple just released iOS version 11.0.3 and it claims to address the Touch Failure on aftermarket screens. For those of you that have been waiting for an official fix, it appears to be here. Make sure to comment below if this update solves your problem.

Update 2017/10/31 - Apple has just released iOS 11.1. Check out the details here."

Hi, I had this problem. Re installing the old LCD and then back the new one worked for me...

"I think what may be happening is after the upgrade to 11, the OS boots and attempts to find all the hardware it is expecting and loads the appropriate drivers or kexts for that hardware. When a third party screens controller isn't the same that is used by Apple is detected, it doesn't load that driver. So the touch never works. This would make sense because a fix I'm seeing around the internet that works is to install the original screen with the Apple controller, upgrade to 11, let it load the touchscreen driver, then swap screens. Since the driver had already been picked before hand, it just works with the new screens controller.

I might be wrong about this, but it seems like a change Apple made in os 11."

I was going to try to downgrade to 10.3.2 and skipped part of the instructions and i somehow just cleaned the entire phone. When it turned on again "like new" and asked me what language my touch worked again.

"Had same problem, you dont need the old screen, just take out your screen and try to power it on without the screen (unplugged) and put the screen on again and turn it on.

Try it a couple of times if it doesnt work at first hand, taking it off and plug in it on again while restaring it."