Originally it was expected to be with us by the end of 2013 as it was thought that Microsoft may adopt the annual software cycle made popular by Apple in an attempt to keep its mobile OS fresh and, more importantly, relevant.
That didn't happen, but from the information that we've been able to gather so far it looks like Windows Phone 9 could be a massive overhaul, so it's not surprising that it's taken over a year.
Before 9 however it looks like we're going to get Windows Phone 8.1. Microsoft looks set to announce 8.1 at its Build conference in April 2014, while further leaks highlight that Windows Phone 8.5 may also be on the cards.
Before we get our teeth in Windows Phone 9 we need to visit the rumors surrounding versions 8.1 and 8.5. They have been confused with the ninth iteration of the platform before, and it's important to make a distinction between all three.
We have many concepts Regarding Windows phone 9.we can see in below concept pitcture