Apple has released iOS 9.0.1 bringing several bug fixes and improvements.
This update contains bug fixes including:
● Fixes an issue where some users could not complete setup assistant after upfating
● Fixes an issue where sometimes alarms and timers could fail to play
● Fixes an issue in Safari and Photos where pausing video could cause the paused frame to appear distorted
● Fixes an issue where some users with a custom APN setup via a profile would lose cellular data
For information on the security content of this update, please visit this website: Apple security updates - Apple Support
Direct download links: http://gsmdude.com/posts/3598/