Abstract: A method and device are presented for delivering a voicemail message to a voicemail system associated with a user device. A first session initiation protocol (SIP) session may be initiated with a first SIP server. Upon receiving a provisional response from the first SIP server, a second SIP session may be initiated with a second SIP server. A response indicating that a call has been successfully established using either the first SIP session or the second SIP session is received. The SIP session in which the call was not established is terminated. Audio from the voicemail system received via the SIP session in which the call was established is analyzed to determine when the voicemail system may receive the voicemail message. The voicemail message is transmitted to the voicemail system via the SIP session in which the call was established.