iOS 7.1 updates include:
- Now Siri knows when to stop listening: Siri will listen only when you hold down the home button and will stop when you release it.
- Set Camera to take HDR photos: Now you can automatically enable HDR quality on the iPhone 5s.
- Updated look and feel: Apple has refined some of the iO7 interface.
- See Calendar events improved: Now you can glance at your events in the Month view.
- Home screen crash: Apple has fixed this crash bug.
- Touch ID fingerprint update: Apple’s Touch ID fingerprint recognition has been improved.
- iPhone 4 improvements: Apple has improved system performance and responsiveness for iPhone 4 users.
To update your system go to Settings, select General, then tap Software Update.