gsm alarm

This web sight is in uk.
This gsm dialer in this webpage below. Will this work on t-moble network?
The page say
(You just choose the right specific network like GSM-900/1800/1900 MHz.)
The gsm dialer might be locked out of the u.s.

http://www.galarm.com/alarm.htm

kcrosslin@comcast.net wrote:
>
> This web sight is in uk.
> This gsm dialer in this webpage below. Will this work on t-moble network?
> The page say
> (You just choose the right specific network like GSM-900/1800/1900 MHz.)
> The gsm dialer might be locked out of the u.s.
>
> http://www.galarm.com/alarm.htm
>
>


Will this dialer work in the u.s. network