This release includes new features, improvements and bug fixes, including:

Live Photos now intelligently senses when you raise or lower your iPhone, so that Live Photos will automatically not record these movements
Over 150 new emoji characters with full support for Unicode 7.0 and 8.0 emojis
Improved stability including CarPlay, Music, Photos, Safari and Search
Improved performance while in Multitasking UI
Fixes an issue that could cause Calendar to become unresponsive in Month view
Fixes an issue that prevented Game Center from launching for some users
Resolves an issue that zoomed the content of some apps
Resolves an issue that could cause an incorrect unread mail count for POP mail accounts
Fixes an issue that prevented users from removing recent contacts from new mail or messages
Fixes an issue that caused some messages to not appear in Mail search results
Resolves an issue that left a grey bar in the body of an Audio Message
Fixes an issue that caused activation errors on some carriers
Fixes an issue that prevented some apps from updating from the App Store