I recently managed to get my hands on a SGH-T819:

(I can't post links yet so just copy/paste the url)

i15.photobucket.com/albums/a396/KSpark/t819.jpg

T-Mobile wouldn't unlock it for me because they're not selling the phone yet, so I tried doing it the other way with those generic unlock codes that have worked for me in the past. Well, long story short, they didn't, and I have the "you're screwed" message (phone freeze, sim unavailable, etc).

Here's the deal: You somehow help me fix this sucker (which was supposed to be an xmas present for my mom ) and I'll tell you everything about the phone, which isn't supposed to ship for quite a while. All I know is that it's one of the first 3G enabled T-Mobile phones, and uses that fourth gsm band they added. And it's impossible to use the keypad.