Does anyone have experience using the Iphone with Firmware 2.0 Beta unlocked (specifically being used on TMobile). From what I have read on this site, visual voice mail will not work on TMobile - is that correct? I am mainly interested to know if the new exchange server feature will work on an unlocked phone on TMoblie. I have been waiting for the firmware update so I can get an Iphone (I need the exchange server for my work) but want to use it on Tmobile. Thanks for any feedback.