Now that TMo has the 8820 out has anyone discovered how to get an ATT 8820 to use UMA on the TMo network.

I purchased an ATT 8820, unlocked it and use it on TMo. I'm not an expert but I don't think there is any hardware difference between the ATT & TMo 8820's so it should just be some software differences that allow the TMo 8820s to use UMA

Anyone figured this out yet?