Merry Flyer, FYI most cellular modems do not work with Digital phone services (such as some AirFones) and can cause damage to your modem and/or computer. Most modems require a standard Analog line. In fact I am trying to search to see if anyone makes a PC Modem Card that will work with Digital service, but so far I have had no luck. If you have managed to find one please let me know as I would like to get one. Thanks.