A messaging method in a system including a wireless network, a routing server, and a plurality of mobile stations. A first mobile station has first communications applications and a first PIN and a second mobile station has second communications applications and a second PIN. The method includes sending an invitation including the first PIN from the first mobile station to the second mobile station using one of the first communications applications, and sending an acceptance including the second PIN from the second mobile station to the first mobile station using one of the second communications applications. The method further includes creating first messages including the second PIN and sending them to the second mobile station through the wireless network, and creating second messages including the first PIN and sending them to the first mobile station through the wireless network. The routing server routes the messages based on the PINs.