We apologize for inconveniencing you if you were affected by the bug in iOS 8.0.1.
To resolve this issue, update your device to iOS 8.0.2 or later.
iOS 8.0.2 is available now. It fixes the loss of cellular service and use of Touch ID that may have affected you if you have an iPhone 6 or iPhone 6 Plus and you downloaded iOS 8.0.1. It includes improvements and bug fixes originally in iOS 8.0.1.
We apologize for inconveniencing you if you were affected by the bug in iOS 8.0.1.
To resolve this issue, update your device to iOS 8.0.2 or later.