Apple released and quickly pulled out iOS 8.0.1 firmware update. The reasons for the sudden halt of the update process were iPhone 6 and iPhone 6 Plus reception and Touch ID issues, caused by the latest OS build. Apple iOS 8.0.1 was originally intended to bring a number of changes and bug fixes. They included making HeathKit apps available, patching up issuers with third-party keyboards, fixing a bug that prevented apps from accessing the photos, as well as a number of other niggles. Apple is currently investigating the iOS 8.0.1 issues and will provide an update soon. Older iPhone models don't appear to be affected by the above issues. Source...
Source: http://www.gsmarena.com/apple_released_and_quickly_pulled_out_ios_801_firmware_update-news-9746.php
