Update 2: If you've already updated, here's how to restore in iTunes and fix iOS 8.0.1 Touch ID and cell issues
Just a week after it released iOS 8, Apple is now offering its first over the air update update, iOS 8.0.1, for its compatible iPhone and iPad devices. The updated can be downloaded directly on your device over the air, or though iTunes.
iOS 8.0.1 contains a number of fixes for bugs found in the initial release of iOS 8. Fixes have been made to HealthKit, Photo Library, data usage for SMS/MMS messages, and more. Issues with 3rd party keyboards have also been addressed, along with problems with uploading photos and videos to Safari.