How to fix iPhone error: Failed – Unable to complete Touch ID setup. Please go back and try again.

Conclusion:  iPhone touch ID error can be caused by a hardware issue and the device may need hardware repairs.

One day the Touch ID feature on my iPhone 6 stopped working.  Attempting to change the phones settings to enable the Touch ID functionality would show the following error: Failed – Unable to complete Touch ID setup.  Please go back and try again.

I followed these steps to troubleshoot this error:

  • Back up the iPhone to iTunes.  Then erase all content and settings to start with a fresh install of the iOS software.  Then tried  to set up Touch ID during initial phone set up was not successful.  This points to a hardware issue.
  • I called Apple support and talked to a technician.  After confirming that the software had already been reinstalled the tech suggested that I visit the genius bar.   I was able to get an appointment for the same day.
  • The Apple genius bar tested my phone and confirmed that the Touch ID error was due to a hardware issue.  Their recommendation was to replace the screen digitizer, the cost would be $110 and it would take about an hour.  If the repair did not fix the issue with Touch ID there would be no charge for the repair.
  • The apple genius to test my battery which is running at 80% of its initial capacity.  The phone is about 1 1/2 years old.

My findings concluded that the Touch ID unable to set up error is caused by a hardware issue.  Apple can attempt to fix the issue by replacing the front screen digitizer but the repair is not guaranteed to solve the problem.

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