Today marks the arrival of Windows Phone 8 in the United States with AT&T's launch of the HTC Windows Phone 8X and Nokia's Lumia 920 and Lumia 820. The Lumia 920 is available in red, black, yellow, white, and cyan, and can be picked up for $99.99 with a two-year commitment or $449.99 off-contract. Those looking to get a HTC Windows Phone 8X in California Blue can do so for $199.99 on-contract for the 16GB version and $99.99 for 8GB — the latter of which is available in Limelight Yellow as well. For the more frugal shoppers, Nokia's Lumia 820 can also be picked up for just $49.99 with commitment or $399.99 without. If you're still on the fence about which device is the right one for you, make sure to check out our reviews of the Lumia 920 and Windows Phone 8X and see how they stack up against the latest from Apple and Android.