I finally got around to connecting to the Internet through my GSM phone. My phone is a Motorola V200 and my service is through Cingular, but through a corporate account (so it's really AT&T; still).
Here's my wvdial.conf
:
[Dialer Defaults]
Modem = /dev/ttyACM0
Baud = 460800
Init1 = ATH
Init2 = ATE1 …
There are comments.