"Gordon Burditt" <gordonb.vmz8i@burditt.org> wrote in message
news:13srsl2pocbpi6d@corp.supernews.com...

> I can, however, go to Settings | Network | Available Networks, and
> see a list: AT&T and T-Mobile. AT&T is given as 310-410 and T-Mobile
> is 310-260. What are these numbers? Cell tower numbers? (I'm in
> Fort Worth).

The numbers are the GSM Network operator codes. They identify the carrier.
The first 3 digits are the country code (the USA is 310 and 311) and the
last three are the system: 260 is T-Mobile's current code (one of the dozen
or more they and their predecessors have used through the years,) 410 is
Cingular/AT&T, 380 was the old AT&T Wireless, 590 is Alltel's GSM roaming
service, etc.

There's a pretty good up-to-date list here:
http://www.howardforums.com/archive/topic/657335-1.html