1. Tmo does not care if you have an unlocked phone. They have a support team that deals with unlocked devices- in regards to set-up for service, but not direct device / hardware support.

2. I posted last week that a Nokia rep was in a store in my area and he pointed out that Nokia pushed for the N900 to be part of Tmo's portfolio, but Tmo does not want to subsidize or support an unlocked phone beyond CS calls for service set-up. He also mentioned that Tmo does not want the N900 due to it price point.

Funny thing is the guy was not at the Tmo store for business reasons, but visiting a friend there. The friend is a neighbor of mine- small world.