A communication interface device includes a wireless Internet packet (IP) transceiver and a flash memory card electrically connected to the transceiver. Also, a universal serial bus (USB) connector is plugged into a hub that holds the flash memory card, with a cord extending from the USB connector and terminating in another USB connector. Accordingly, the flash memory card of the device can be engaged with a slot of a user terminal or, if a user terminal has no slot, the USB connector is engaged with a USB receptacle of the user terminal, to establish wireless communication between the terminal and a base station of a wireless LAN/WAN.