Cell phone technology, of course, doesn’t work like TCP/IP, but it can “dial in” from remote locations where cell phone base stations exist. And, according to Day, it’s getting harder and harder to find locations in the US where people exist and cell phone technology doesn’t.
A primary advantage to cell phone technology is its reasonably low cost hardware, which often is reduced to a single chip or two. In countries like India and China where cell technology is the primary communication medium requiring no wired infrastructure, the costs are relatively low in comparison to a wired network.