I'm also wondering which version they are selling.
Interestingly, I was at the Microsoft store on Sunday as my girlfriend was replacing her phone. They kept trying to sell her on an unlocked 1020. The weird part is that she is on Verizon! I knew she wasn't going to buy it, but I kept asking them "are you sure that'll work?" to which the manager of the store replied "It's unlocked, it'll work with any carrier."
Well, I guess he didn't lie as it should work on LTE and maybe 3G, but there's no CDMA radio. Unless someone can correct me here, I'm really unhappy about this misinformation and pushing of a $550 incompatible phone!