The present invention relates to methods for sending and receiving sound based messages in an efficient way between one or several mobile communication terminals, a mobile communication terminal, a computer program, and a system and method for handling an audio messaging service (AMS) chat session between mobile communication apparatuses. The methods for sending and receiving comprises steps for handling AMS chat sessions in the mobile communication apparatus. The mobile communication comprises means for handling AMS chat sessions. The system comprises means for handling AMS in a network; a server; and mobile communication apparatuses accessing the server, wherein the mobile communication apparatuses are adapted to send a request for participating in an AMS chat session to the server, and the server is arranged to provide an AMS message for the mobile communication apparatuses, to update the AMS message from the mobile communication apparatuses, and to transmit the updated AMS message to the mobile communication apparatuses participating in the chat session. The method for handling an audio messaging service AMS chat session between mobile communication apparatuses comprises steps for handling AMS chat sessions in the system.