In the development of mobile communication there is a trend towards more personalized ways of communication and forms of expression. By using a User-to-User Signalling (UUS) supplementary service that allows a served subscriber to send/receive a limited amount of subscriber generated information to/from another user in association with a call and working parallel to the normal communication channel, personalized items can be transferred during call set-up and during call. Examples of what kind of personalization items are text messages, picture messages, animations or ringing tones.