The customer had used his phone as a wireless modem for his computer, and so data transferred was not included under the customer's unlimited mobile browser plan.

Wireless modems come in a variety of types, bandwidths, and speeds.

Wireless modems can be embedded inside a laptop or appliance, or be external to it.

Most cellphones, which supports data communications, can be used as wireless modems (via cable or bluetooth), to connect computer to internet.

Wireless modems are often referred to as transparent or smart.