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I have an iPhone 6 which is NOT Jail Broken. The current version of iOS on the phone is 8.1.3 and yesterday I wanted to update to iOS 8.2 . The download went through without any problem but while installing, it gave the error - "Unable to Install Update An error occurred installing iOS 8.2". Tried installing after switching Off and ON and also tried Hard Reset (Holding Home button and On/off switch). Same error displays every time. Also the Touch Id has stopped working and I find that the Settings - Touch ID & Passcode - iPhone Unlock is OFF. When I try to switch it ON, the system displays the error " Failed Unable to complete Touch ID setup. Please go back and try again".

Is anyone facing this problem? I live in India.

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    Have you tried installing it through iTunes? – user24601 Mar 19 '15 at 3:57
  • Got into more problems. Tried installing 8.2 through iTunes. Half way through the installation it gave error 53 and aborted. Because the installation was halfway through, the phone did not wake up. It was asking for link to iTunes. When I connected to iTunes, it said the iPhone has to be restored to factory setting. On confirmation, the process started and after some time again it gave error 53. Now I am stuck with a dead iPhone 6. I will have to take it to the Apple Service center and see what they can do. :( – Skun Mar 21 '15 at 21:13
  • iOS is the most unstable thing to upgrade ever. Just use the older version until more time has passed to save yourself trouble from data loss and bricked phones. – Pacerier Oct 22 '15 at 20:40
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Power off the phone, and hold down the power button and home button at the same time until the device powers on. At that time, release the power button, but continue to hold the home button, which should start your phone in recovery mode and show an iTunes/USB Plug icon on the screen, which indicates for you to plug it into your computer with the USB data cable (computer with iTunes installed on it and open.)

Once you plug in the USB data cable to your phone/computer with iTunes, it should detect a phone (your phone) in recovery mode, and you should be able to fully recover your phone by flashing the latest iOS version to it.

I hope this helps ;)

-James

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