I have also tried this but I use cingular.
These are the settings I have tried.
Setting on laptop that work.
APN: leave blank
Username: leave blank
Password: leave blank
Number to dial: *99#
Modem Initialization string - +cgdcont=1,"IP","WAP.CINGULAR"
As I said this works with my laptop but not on the 910. I have also tried many different variables including.
APN: wap.cingular
Username:
Password: CINGULAR1
Number to dial: *99#
Modem Initialization string - +cgdcont=1,"IP","WAP.CINGULAR"
If anyone figures this out, please let me know. I even when as far as upgrading the OS on my phone to the latest version and still no go.