Tested:
TT920, AT&T, Nokia N75: All working except for SMS. Had to cusomize the login to proxy, no user name, no password, and *99# for the number. I am able to recieve weather updates and download maps, voices, etc...
TT920T, AT&T, Samsung A727: Same as above.
Subaru,
I have Nokia 6682 and TT 720. TT Customer Service refuses to give me the settings to my phone since it's not on the list (even though it's the same phone as 6681 which is on their list). I have AT&T now (been with Cingular) and TT is able to find my phone (able to send/receive calls, but I cannot hear or speak through TT), sync with it and transfer the phone book from my phone to TT.
When I try to do TT PLUS service, it finds my phone, goes to about 50%-60% but then it says that process cannot be completed (even though when I sync it through BT, it does say that I am able to use that feature). I tested some other phones that are on TT compatibility list (through AT&T), but when synced through BT, TT gives me a noticed that I am only able to use phone features.
Would you be able to share your settings? I tested N75 in AT&T store and BT worked fine...