The Changelog for the iOS 7.1 update

iOS 7.1 Changelog

#This update contains improvements and bug fixes, including:
##CarPlay
* iOS experience designed for the car  
* Simply connect your iPhone to a CarPlay-enabled vehicle  
* Supports Phone, Music, Maps, Messages and third-party audio apps  
* Control with Siri and the car's touchscreen, knobs and buttons  
##Siri  
* Manually control when Siri listens by holding down the Home button while you speak and releasing it when you're done as an alternative to letting Siri automatically notice when you stop talking  
* New, more natural-sounding male and female voices for Mandarin Chinese, UK English, Australian English and Japanese  
##iTunes Radio  
* Search field above Featured Stations to easily create stations based on your favourite artist or song  
* Buy albums with the tap of a button from Now Playing  
* Subscribe to iTunes Match on your iPhone, iPad or iPod touch to enjoy iTunes Radio ad-free  
##Calendar
* Option to display events in month view  
* Country-specific holidays automatically added for many countries  
##Accessibility
* Bold font option now includes the keyboard, calculator and many icon glyphs  
* Reduce Motion option now includes Weather, Messages and multitasking UI animations  

* New options to display button shapes, darken app colours and reduce white point  
* New Camera setting to automatically enable HDR for iPhone 5s  
* iCloud Keychain support in additional countries  
* FaceTime call notifications are automatically cleared when you answer a call on another device  
* Fixes a bug that could occasionally cause a Home screen crash  
* Improves Touch ID fingerprint recognition  
* Improved performance for iPhone 4  
* Fixes display of Mail unread badge for numbers greater than 10,000  
* Continued user interface refinements  
**For information on the security content of this update, please visit this website:
[http://support.apple.com/kb/HT1222]**