As it was spoken earlier At&t will be the initial provider of the new windows phone 8 phablet, this starts from today as Microsoft is offering a pre-order on Lumia 1520 for $199 on a 2 year contract on At&t. The deal is made sweeter by offering some additional goodies like the flip cover and $50 app card. The colors available are White, Black and Red (There is no difference in price though). Without a contract you can get it for $549 though it will be for At&t networks only. The offer is till 21st November and shipping will start from the next day November 22.
If you wish to get your hands on an unlocked lumia 1520 then you might have to spend more than a few bucks for it as an online retailer Unlocked-Mobiles.com will ship it you after 25th November if you pre-order now. The price is 594.98 Euros (798.468 USD give or take).