Method for retrieving and delivering multimedia messages using the session initiation protocol

A flowing for retrieving a AN information (N404) method of AN user agent (180) is executing, comprising the following steps: A with AN earphone to request (M401); The MMS reservation request (M401) transmitted to a AN server (130); From the MMS server (130) and AN information (N404) is AN inform (M405); The response in the receiving AN informs (M405), with AN information to retrieval request (M409) is retrieve and AN information (N404); To said AN server (130) to transmit and AN information to retrieval request (M409); Receiving device comprises AN the server (130) and AN retrieval to request (M411), with AN server (130) to transmit to confirm (M413); Improved and characterized in that: The AN earphone to request (M401) is transmitted by SIP method, SUBSCRIBEIs AN to inform (M405) is received by SIP method, NOTIFYA AN information to retrieval request (M409) is transmitted by SIP method, FETCHAnd is confirmed (M413) is transmitted by IS INFORM method.