The disclosure provides a module for use in a wireless electronic device and being removable therefrom. In one embodiment, the module includes an antenna connector for connecting the antenna of the wireless terminal to the module, and transferring radio frequency signals over a wireless interface. The module also includes a first storage means storing user authentication information for use in authenticating a user of the wireless terminal to a wireless cellular network, and a second storage means storing communications code for processing information to be transferred over the wireless interface. The module further includes a processor arranged to execute the communications code in order to process information for communicating between the wireless terminal and the cellular network via the antenna connector.