A radio telecommunication apparatus includes a storage for storing a system identification data of a system to which the apparatus belongs to and provides an indication relating to where the apparatus is present on the basis of a result of a comparison between the system identification data stored in...http://www.google.es/patents/US5444765?utm_source=gb-gplus-sharePatente US5444765 - Radio telephone apparatus having a service area confirmation
Radio telephone apparatus having a service area confirmation
