Abstract: A mobile terminal capable of supporting a plurality of accessory functions with one or more accessories, the mobile terminal capable of supporting each accessory function in two or more modes, and each accessory storing a capability array indicative of the capabilities of the accessory. The mobile terminal comprises reading means for reading a capability array from an accessory; interpreting means for interpreting a capability array read by the reading means in accordance with a predefined format as including one or more fields, each field corresponding to an accessory function; identifying means for identifying a mode of an accessory function in dependence on the content of a field of the capability array, the field corresponding to the accessory function; and supporting means responsive to the identifying means for supporting the accessory function with the accessory in the mode identified by the identifying means.