How to install ios7 in iPhone 4?

I using iphone 4 with ios 6.1.3 software,
i want to install ios 7 in my iphone
so kindly help me to what is the exact process of installation?

It ain't out yet estupid!

Unless you want to pay $99 for a developer account just wait till October. Besides I highly recommend you stay at 6.1.3 as many games will crash on start if you update to iOS 7.

You download the correct IPSW file for your device and then shift+ restore in iTunes and then it will be on iOS 7 beta. The beta for iPhone 4 is really really unstable and i wouldnt suggest putting it on your device if you plan to use it daily

It isn't meant for you actually the whole apple company is not meant for you "you are better of at using samsung of micromax "