Have a look at the crappy code in
 
http://www.gjcp.net/~gordonjcp/radiomap.tar.bz2
 You'll see that I sent AT+CSQ to query the phone's RSSI, and AT+CREG? to
 determine LAC and CellID.
 There's a huge list of possible commands, including things like
 manipulating the SIM card, sending text messages, placing calls,
 answering calls, reading CLID, *all* kinds. 
Fascinating. Well, I'm actually reassured. If I run across a modem in
the future, odds are I'll still know how to basically talk to it. :)
--
------------------------------------ personal: 
http://www.cameronkaiser.com/ --
  Cameron Kaiser * Floodgap Systems * 
www.floodgap.com * ckaiser at 
floodgap.com
-- Not sun-worshippers: Son-worshippers! -- Uhura, Star Trek "Bread &
Circuses"