GSM detection/identification

Matt Joyce matt.joyce at
Thu Jul 31 04:05:51 CEST 2008

On Thu, Jul 31, 2008 at 10:38 AM, Paul Buede <paul at> wrote:
> Anybody else know what I can query or run to view available cell
> carriers at any given time?  Is this even possible?  Correct me if I am
> wrong, I am kind of making this up to try and figure out how it works:

I had a play last night, I was trying to find out what towers were contactable.
I wasn't successful, but you might be with your investigations.

The wiki has some interesting info on GSM :

The AT commands to interact with the hardware are here :
(I wonder if they are an extension of the earlier dial up modem
commands ala Hayes?)

here's how you use the commands:

these command may work for you :

        r       Register to network
        R       Register to given operator (R=number)
        U       Unregister from netowrk
        P       Print current operator
        N       Print current operator in numeric
        L       List available operators
        Q       Read signal quality
        nr      Query network registration

As I mentioned, I wanted to find all contactable sites, but didn't
find a command for that.



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