I use an unlocked 720 with tmobile prepaid and I ran into some annoyances with the service. Mostly with spotty 3G and MMS failing. 620 is a lot of value but 520 might be a better mesh with the network.
I guess so. I had a 360 for a long time (playing on a monitor) and a their paid subscription thing and I found out you can’t cancel halfway through the year… Blah. Microsoft thinks their customers are rich or something.