For the last couple of years I’ve used BT’s Openzone system to give me Internet connectivity when I’m away from home. This uses WiFi hotspots, but by one of those unfortunate twists of fate, most places I went had iffy WiFi hotspots, but excellent Mobile Phone coverage.
So, I decided to use the Web and Walk system offered by T-Mobile. Part of the thinking here was to make it easier for me to demonstrate systems ‘in the field’ and also allow me to stay in touch with my projects more when I’m away from home.