I currently have the Lumia 635 running 8.1 with T-Mobile here in the U.S. and I'm thinking of buying an unlocked 650 from MS. One of my big issues with the 635 is that I get lousy to non-existent reception in the building where I work. I know though that the unlocked 650 doesn't use Band 12 and for that reason, I'm hesitant to get it. Would anyone know if the antenna placement on the 650 provides somewhat better reception than the 635? I'm debating if I should just go for the 650 or hold out to see what (if any) new Windows phones eventually turn up. Also, does anyone think that T-Mobile will carry the 650 at some point or is it going to remain exclusive to Cricket?