A method and system for connecting a user identification module to a
wireless host device are described. The user identification module is
inserted in an accessory card that fits in the host device, and includes a
radio transreceiver to connect to a wireless network. When the accessory
card is placed in the host device, a mating surface of the host device
blocks removal of the user identification module from the accessory card.
The accessory card may be connected to the host device by inserting in a
slot of the host device an edge of the accessory card from which extends
an interface.