Nokia and AT&T are getting ready to launch their new Windows Phone, called the Lumia 900. This phone is running Microsoft’s Windows Phone 7 operating system. Microsoft has greatly improved this platform since the early days of Windows Mobile. It’s user interface is completely different from Android and iOS. It also runs mobile versions of Microsoft Office. These phones could easily be incorporated into your company email system and will reportedly cost less than $100. This is one of the cheapest 4G phones to hit the market.