just as a piece of advice to everyone you should see if you can use this apn:
epc.tmobile.com
run the config on tmobiles site then change the apn to that and disable the proxy. that way your mms settings can get set properly.
that is the new apn they are rolling out and are replacing wap.voicestream.com with that, at the moment its at full speed and not proxied in 90% percent of locations.
