This is it. The stakes couldn’t be higher. The future of Windows Mobile Phone hinges on the success of the Nokia Lumia 900. The phone has a huge amount of hype. It’s priced right at $99 on-contract and it’s a drop-dead gorgeous device. Nokia’s latest marketing campaign directly targets Apple and Google. If any phone could rocket Windows Phone 7 to success it’s the Lumia 900. It’s just too bad Microsoft and Nokia tasked lowly AT&T of all carriers to launch this pivotal phone. And for whatever unknown reason, on Easter Sunday.

The Lumia 900 is arguably the hottest phone of the year so far. It debuted back at CES where it was called a larger Lumia 800, which is about right. The 900 shares the same design spec as the 800 but sports a larger 4.3-inch display and 4G LTE connectivity. But that’s not a bad thing. Much…