iPhone 6 won't install iOS 9.2.1

[Memere6]

My iPhone 6 downloaded iOS 9.2.1. It will not install. I read that I should connect phone to computer and update through iTunes. That did not work at all. I now have a phone that does not work. Won't even turn on

[kaebfly]

Are you getting an error message?

[Memere6]

Yes but I don't remember.  Maybe 53 or 83. It has to do with Touch ID.

[kaebfly]

Has your iPhone ever been repaired for Touch ID issues? Seems like that error is a hardware error and has affected people attempting to upgrade iOS based on the few articles I read associated with that error (53). If you are still under warranty you may need to contact Apple if further attempts to update won't allow you to move forward.

[Memere6]

No it has never been repaired.

[kaebfly]

Have you attempted to install the iOS again?

[Memere6]

Yes. At least 6 times.

[kaebfly]

Again, if you are still under warranty I would suggest contacting Apple. It's possible that they may still offer assistance outside of the warranty for iOS installation issues but I'm not sure.

[Memere6]

Thanks for your help. I'll give them a call.

[koolmexdude]

Contact Apple if you still have the 90 days free phone assistance (assistance over the phone).

Or you can try this: Press the power and volume up button at the same time and keep them pressed until the phone reboots and starts again.