MOBILE COMMUNICATION SYSTEM WHICH TRANSMITS SHORT MESSAGES

摘要

The object of the invention is to provide a method and an apparatus implementing the method which allow the subscriber to evaluate the authenticity of sender data in an incoming short message. Short message service centres are arranged to add an identifier containing information on whether the identity of the sender of a message transmitted by the short message service centre is guaranteed to data units containing a short message. If the data unit containing the short message comprises said identifier, the subscriber's terminal indicates the information included in the identifier to the subscriber.