how can my Iphone 6 Mirrorcast on my SmartTV
How to mirrorcast iPhone 6 on smart TV?
iPhone 6, iOS 9.1
Miracast is what I think you mean. Miracast is not an Apple supported feature. AirPlay is the Apple similar service and it requires and Apple TV box. You can purchase an app in iOS App Store to miracast if you like. This is a link to one such app. I don't know how well these apps work because I have AirPlay so read the reviews and decide which seems best for you.