Update: As you can see as we dug a little further into the manual, the Nokia C7 should launch with UMA service on board, which fits nicely with what our ninjas have been saying.
Well would you look at that, just two days after posting up intel that the Nokia C7, possibly known as the Tiger will be released on T-Mobile, it goes and hits the FCC with clear T-Mobile intentions. Those fine folks at Engadget have honed their FCC searching skills and come up with the FCC approved C7 user manual complete with T-Mobile hints. Pair that with the AWS 3G approved version and all signs point to a go with Magenta.
Engadget via FCC