Fix: Unable to Activate Touch ID on this iPhone

When you see the “Unable to Activate Touch ID on this iPhone” error, it usually means the device cannot detect the fingerprint sensor, stopping you from setting it up. This problem often happens after system updates or repairs, like screen replacements, which can mess up the fingerprint sensor’s connection or settings.

The error usually means there is either a software issue or a hardware problem. A common reason is damage or misalignment of the fingerprint sensor, especially if the device has had unofficial repairs. Other possible causes include recent iOS updates that might affect the Touch ID system.

1. Activate Touch ID from Settings on iPhone.

Resetting your Touch ID settings can fix small problems. By redoing the setup, the device removes incorrect settings linked to the fingerprint sensor, helping it work properly. This quick step can solve minor issues and improve Touch ID performance.

1. Open the Settings app on your iPhone.
2. Go to Touch ID & Passcode.
3. Enter your password.
4. Disable the iTunes app and restart your iPhone.
5. Reopen the Settings app.
6. Turn off iTunes and App Store.
7. Delete the existing fingerprint by tapping Delete.
8. Add a new fingerprint: Place your finger on the sensor and follow the instructions to set it up.
9. Restart your iPhone: Your new fingerprint will then be activated.

2. Reboot Your Device.

This issue can occur due to software glitches or conflicts that stop Touch ID from working. Restarting your device can fix these problems by resetting the connection with the fingerprint sensor and its software.

2.1. How to reboot iPhone 6 and earlier models.

1. Press and hold the Power and Home buttons together. Hold for about 10 seconds until the Apple logo appears, then release them.

2.2 How to reboot iPhone 7 and 7 Plus.

1. Press and hold the Power and Volume buttons together. Hold for about 10 seconds until the Apple logo appears, then release them.

How to reboot iPhone 8, 8 Plus, X, XS, XS Max, XR.

1. Quickly press and release the Volume Up button.
2. Immediately press and hold the Volume Down and Power buttons together. Hold for about 10 seconds until the Apple logo appears, then release them.

3. Factory Restore Your iPhone.

If other solutions haven’t worked, a factory reset can fix Touch ID issues. This process erases all data and settings, removing software conflicts or corrupt files. Remember to back up your device first to save your data.

1. Open iTunes on your computer.
2. Ensure you have the latest software. Go to the Help tab and click Check for updates. If needed, click Install.
3. Connect your iPhone to the computer using a USB cable.
4. If prompted, enter your passcode or Trust this computer and follow the steps.
5. Select your device.
6. Click the Restore iPhone button in the summary panel.
7. Click Restore again to confirm. iTunes will erase your device and install the latest iOS.
8. Set up your iPhone after the process finishes.