Push to talk is actually an old concept but this app for the first time is introducing on iOS platform for the first time by AT&T. iOS is the world’s most advanced operating system. It has easy to use interface and amazing features. It is very easy to use let it be iPad, iPod or iPhone. The home screen is simple and the easiest place to start with. There around 900, 00 games and apps available from the apple store. Everything about this phone is fun and intuitive. The amazing features and built in apps makes it more powerful and easy to use.iOS6 gives you more features to make the things you do everyday better. It is free and easy to upgrade.