Last night Apple released a faulty update effecting users who updated.
Symptons of the problem include not being able to recieve any service and TouchID failing.

Apple have released a fix to restore to iOS 8 while they correct the update.

Follow these steps to reinstall iOS 8.0.

  1. Make sure that you’re using the latest version of iTunes.
  2. Connect your iPhone to iTunes.
  3. Back up your iPhone in iTunes on your Mac or PC. iCloud backups won’t restore to earlier versions, including iOS 8.0.
  4. Download the file below that corresponds to your device:
  5. iPhone 6
  6. iPhone 6 Plus
  7. Select the file you just downloaded by doing one of these in iTunes:
  8. Mac: Press the Option key and click Check for Update.
  9. Windows: Press the Shift key and click Check for Update.
  10. Press Update to install iOS 8 on your iPhone.

The Health app won’t work in iOS 8 after these steps. It will be fixed in our upcoming iOS 8.0.2 software update.

 

(Image iPhone 6 Plus – Display by William Hook, on Flickr : https://flic.kr/p/p1zcVG )