What are wireless modems? These are devices that permit computers to connect to a WLAN (wireless local area network) without physical cabling, ethernet wiring for example. These modems make use of cellular, satellite or WiFi protocols to connect to a WLAN, which will then provide access to the Internet. This varies from dial-up and DSL modems that use telephone lines to be able to connect to the Internet, while cable modems use cable television lines to connect.

For mobile purposes, a wireless modem card called PCMCIA in a laptop computer could provide Internet access via public hotspots. Hotspots are areas where WLANs let public access to the Internet. In some cases a little membership fee is required, but other hotspots don't ask for a fee at all. Yet another popular network for mobile such modem is wireless fidelity (WiFi), which can operate at a respectable 400 kbps. WiFi is utilized in many Internet cafes as well as other hotspots. There is a newer standard that provides faster speeds and more features, we know as WiFiMax.

Although wireless modems are certified as being compatible with specific standards and protocols, you have to be certain the modem you pay for has the features necessary for the networks you plan to get connected to.