No wireless signal at your office or home office?
8/2010
Introducing the solution: "AT&T Microcell"
Get one. You'll go from 0 bars to as much as 5 full bars.
The mircocell device, about the same size as a typical router, hooks up to a router or directly to a e.g. cable modem, and searches the net for the nearest yet strongest cell tower. Voila...connected.
About $150.00 at most AT&T stores. About 90 minute signal connection time. Done.
Of course, you'll need AT&T's service to begin with. (Or, check other carriers for similar options.)