On September 24, 2014 Apple released iOS 8.01 a minor update to its flagship iOS operating system. The update was available in both iTunes download and OTA (over the air) versions for all the major carriers. The update was supposed to resolve the following issues:
- Fixes a bug so HealthKit apps can now be made available on the App Store
- Addresses an issue where 3rd party keyboards could become deselected when a user enters their passcode
- Fixes an issue that prevented some apps from accessing photos from the iPhoto Library
- Improves the reliability of the Reachability feature on the iPhone 6 and iPhone 6 Plus
- Fixes an issue that could cause unexpected cellular data usage when receiving SMS/MMS messages
- Better support of Ask To Buy for Family Sharing for in-app purchases
- Fixes an issue where ringtones were sometimes not restored from iCloud backups
- Fixes a bug that prevented uploading photos and videos from Safari
Users of the new iPhone 6 and 6 Plus however got a nasty surprise. Seemingly due to a bug in the OTA version of the update, users who installed the iOS 8.01 update were no longer able to connect via cellular service and additionally had Touch ID disabled.
Within the hour of release Apple pulled the iOS 8.01 update. Apple has published a support document recommending users revert to iOS 8.0 here. The document has instructions on how to restore your device to iOS 8.00. iMore also has a good post on other avenues for getting your device back to a functional state which can be found here.