I also had to call TMO Tech Support (Smartphone Tier 2) and they ended up making some edits to the settings on my account. After that, my visual voicemail and the web finally started working fine. I also re-enabled the apn setting with epc.tmobile.com. Everything seems to work fine now, but it does seem more spotty than usual. Hopefully it was as simple as a network outage. Those are fixed easily. Faulty firmware would trouble me more.
I am a trooper when it comes to this type stuff. The phone has practically got to blow up in my hands for me to take it back. I realize there are glitches with new products and because I always choose to be one of the first to have it, I accept that everything might not line up correctly. Around day 13
I recheck. Plus, there is no issue I have ever had with a BB that you kind folks on this forum haven't been able to help me resolve. So, once I buy, its mine to keep! (until the next model comes out)