The mini-MT™ from Enfora®
is a fully certified communications device based on the Enabler™
family
of GSM/GPRS/EDGE modems and GPS receivers. It can be configured over
the air, via GPRS or SMS and locally using the USB serial interface
using AT commands. There are a selection of progammable buttons for
features
such as geofencing and location alerts (over SMS or GPRS) for tracking
or breadcrumb trials. It is designed for remote worker applications and
is sturdy and simple to operate, with push to talk functionality. More
information here.