Did some searching, and didn't see a similar thread.

T-Mobile 8700 with APN set to wap.voicestream.com

On Google Talk, I can send messages out, but when people respond, I never receive them.
Same thing with Ramble, and also another issue with Ramble is that when I go to view a users information, it just comes up as a blank white screen.

It's almost acting like it's firewalled, but I'm not sure what else to try and change.

Sucessfully used and installed Opera Mini and Google Maps, so the data part seems to be working fine.

Any ideas?