Hi,
I had a similar situation where a location did not have a net connection, so I tried AT&T laptop connect usb device with a 3g router. After much investigation, this did NOT work when I wanted to remotely access the devices connected via the AT&T laptop connect and had to do with "mobile terminated data". Of course, calling at&t support, most didn't even know what this is. Fortunately I was able to get DSL installed in this location. So in closing, while net access while at the remote location using one of the many cellular 3g connections does work, remotely accessing this location does not work (unless you figure out how to get the cell provider to enable mobile terminated data).
