I'm new with BB 8320. my BB is a T-Mobile unlocked updated to OS 4.5 and the only issue is about to access the MSN or other messeger aplication through the WiFi connection. I found the UMA is not available, showing the following message on WiFi diagnostics screen : Error Code: W006.1 - error from acess provider or T-mobile network. I don't have data plan with TIM. I'd appreciatte any help to move forward solving this issue.