Here is a video tutorial to upgrade your iOS 6xx device to the newly announced iOS 7 beta version and check out all the features I have given here. Please remember, do not upgrade the phone if you have jail broken it.
And if you don't like the Apple's new offering you can always downgrade your phone back to iOS 6.1.X (6.1.4 for iPhone 5, 6.1.3 for iPhone 4S) check this video tutorial
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