January 28, 2026 -Hard reboot your device. The Touch ID problem could be temporary and solved with a good reboot. Go to Settings > Touch ID & Passcode and disable all options. Then, restart your iPhone or your iPad and re-enable the features you want to be turned on.
March 30, 2026 -Then make sure that iPhone Unlock or iTunes & App Store is on, and that you've enrolled one or more fingerprints. Try enrolling a different finger. If the previous steps didn't help, you see "Failed—unable to complete Touch ID setup", you still can't turn on Touch ID, or Touch ID is dimmed or grayed out, you might need service. ... You might need to enter your passcode or Apple Account instead of using Touch ID in these situations: ... You haven’t unlocked your iPhone with the passcode in the last 6.5 days, and you haven’t unlocked it with Face ID or Touch ID in the last 4 hours

As we can see from the illustration, Iphone 6 Fingerprint Id Won'T Work has many fascinating aspects to explore.
Why is MyiPhone6FingerprintScanner Not Working? Alright, let's break down the most common culprits behind a failingiPhone6fingerprintscanner. Sometimes, it's something super simple, like a bit of gunk on the sensor, and other times, it might be a software glitch that needs a little nudge. Understanding these potential issues is the first step to getting your TouchIDback in action.

August 27, 2018 -Hi Im using iphone 5s , i also experienced the same issue for touch id , and i found a solution byrestarting your iphone using Assistivetouch shortcut. after restarting your phone try to add a new passcode and fingerprint.