Methods using a portable USB communication device that is plug connectable to an external USB port of a first computing device for enabling phone calling. Upon plug connecting the portable communication device to the first computing device, a phone calling application running at the first computing device is enabled by employing at least in part a phone calling software component stored in the portable communication device. The portable communication device includes a controller unit to facilitate installation of at least part of phone calling software for running at the computing device. Subsequent to disconnecting from the first computing device, the user may also alternatively connect the portable communication device to an Ethernet port of a second computing device for enabling Internet access and phone calling without the first computing device.