Hey guys and gals, I've downloaded the Tmobile OS for an 8700 that is currently branded for CIngular. Once I connect the phone, Desktop Manager never askes me to upgrade the phones firmware/OS. Is there a way to manually update the phone? Does it have to be unlocked first? Bottom line is It's an 8700C Cingular and I want to use it on Tmobile and have a Tmobile OS. How do I do this?

Thanks

JM