Reverting back to iOS 8.0 from iOS 8.0.1

8.0.1 will kill your cellular service and your TouchID button.

I upgraded from 8.0 to 8.0.1 this morning like a good soldier and noticed immediately my phone read No Service. I didn’t really think about it because I’m inside a building and that happens sometimes.  An hour later my co-worker read me all the tweets flying about how the update kills your cellular service. So lo and behold the TouchID was broken too.

Here is the process I used to get my phone back and working:

  1. Plug it into iTunes
  2. Back up your phone. (This will not back up the OS. This will only backup all of your apps, text messages, etc. any data on the phone. )
  3. Download the image of iOS 8 from the internet here: iOS 8 Image List
  4. Hold Option and click Restore iPhone
  5. Select the iOS 8 IPSW firmware you just downloaded
  6. Click Restore and wait for iTunes to restore iOS 8
  7. When it’s done restore the backup you made in Step #2

Everything is working for me now, like it was before the update.  The whole process took less than 30 minutes. The download, which is 2 gb, will take longer than the restore process itself; which is quick.

I hope this helps fix your phone if you updated, or prevented you from breaking your phone with the update.