Do you own an iOS device ? Apple will release updates to iOs devices time to time with new features, bug fixes and security updates. We strongly recommend you to upgrade your device with the latest firmware always.
Latest Firmware available is iOS 7.1.1 (as on May 26th 2014)
With iOS 7.1 your iPhone will support in-car calling, music, maps and messaging through Siri. Apple’s digital assistant also will get more natural sounding voices for U.K. English, Australian English, Japanese and Mandarin Chinese. Other new features include:
Here is a Free eBook which tell you How to upgrade your iOS devices. It includes step by step detailed instructions with images.
Get the free eBook guide from here