How do I set up Airplay on my iPhone 5
Do I need to upgrade operating system?
iPhone 5, iOS 7.1.2
Do I need to upgrade operating system?
iPhone 5, iOS 7.1.2
You should update your iOS version if you are still on iOS 7, but it is not required.
You need an AirPort Express or Apple TV.
Use AirPlay to wirelessly stream content from your iPhone, iPad, or iPod touch - Apple Support
How do I set up Airplay on my iPhone 5