I've just read this BBC news article regarding the latest iOS upgrade. I havnt got round to upgrading to iOS 9.2.1 yet but 2 weeks ago dropped my phone cracking the screen which was replaced by a non Apple phone repairer. I've done a search on this forum on error 53 and read what's already been out here but wondered if this is likely to cause issues before I upgrade? It was the glass which cracked. The Touch ID worked perfectly (as did the screen) after it had been dropped and I only paid £80 for the repair so not sure if they did anything to the Touch ID button but wondered if I should refrain from updating?
Bbc article below if anyone hasn't seen it yet. Not sure if this is a new issue.
iPhones 'disabled' if Apple detects third-party repairs
http://www.bbc.co.uk/news/technology-35502030
If your flash memory was damaged during the impact, you could end up with a bricked phone. It's rare, but there is always the 1%. Updating will bring you no must-have features until 9.3, but it will stop the annoying update message.
[doublepost=1454823288][/doublepost]
Worth noting as well that Apple considers a non-Apple replacement of the Touch ID assembly to be a third party modification, and as per the rules established by Apple an authorised repair center is unable to accept these devices even if the customer offers to pay to have the issue rectified. The AppleCare repair center will send the device back un-repaired if a third party modification is found on inspection.
I can't see any way that a customer would be able to correct this issue without purchasing a new phone. Which sucks, because the phone would otherwise work fine if Apple would simply disable the Touch ID feature entirely but leave the phone operational as was the case in the past.
I haven't stared at a 3rd-party Touch ID much compared with an original, but in any event, you could use an original Touch ID from a broken iPhone 6. As long as you wipe off your prints from the LCD shield and shield covering the screen cables(making sure not to mix up the screws), there wouldn't be any clear signs of tampering other than the Error 53. I just had a look at one the other day, but the person who previously did the screen repair broke off the metal hole for the middle screw somehow, so I'll just keep it and advise the next owner not to update *fingers crossed*.