The purpose of this EN is to describe typical attributes of different types of Mobile Stations (MS) to be used on GSM PLMNs. The term GSM PLMN refers to a GSM@ DCS 1800 or any PLMN based on the GSM specification@ irrespective of the frequency band used. Manufacturers and customers may choose any appropriate combination of these attributes in order to fulfil their need while utilizing the services offered through a GSM or a DCS 1800 PLMN. This is not an exhaustive list of attributes or types of MS. Type approval of MSs is addressed in GSM 11.10.