My touch id not working after update my ios 91 i reset my settings erase my data set up as new iPhone. But no use. Touch Id Not Working With Ios 11 0 3 Apple Community It was first introduced with iPhone 5S in 2013. Iphone touch id malfunction . If you have updated your iPhone or apps to the latest version or changed your iPhone settings the Touch ID may malfunction or become less sensitive. Solve Unable to Activate Touch ID on This iPhone with iPhones Settings. I would try a hard reset LockDownVol buttons for 10 secs. But it doesnt always work the way it should. Keep holding the Side button until you see the recovery mode screen. For iPhone 6 and later versions touch ID is bonded with CPU and the user who has replaced his home button will then lose its touch ID fingerprint function. Though sometimes these features can clash with the native Touch ID function and cause it to malfunction. If none of that works or you get an error message then you will need to take y...