Abstract: A method of making Voice over Internet Protocol (VoIP) calls, legacy circuit calls, sending/receiving Short Message Service (SMS) over Long Term Evolution (LTE) modem or a legacy modem on a mobile terminal with both kinds of modems, and providing all legacy modem functions is disclosed. In addition, methods for dynamic selection of radio in a mobile terminal capable of Rich Communications Services (RCS) capabilities, and a method for redirecting RCS traffic to an alternate network interface is also disclosed. Methods for Session Initiation Protocol module (SIP) stack functions to be distributed across different processors on a mobile terminal, and directed to different network interfaces is disclosed. Methods of adding video calling and RCS functions without encountering the dual registration problem are also disclosed.

Abstract: Systems and methods for providing a generic interface in a communications environment are provided. A communications services interface may receive a first and second application function call specifying a first and second communications channel, respectively. The first and second communications channels may utilize a first and second communications protocol, respectively, to communicate over a network. The communications services interface may send a first protocol command and a second protocol command to control communications over the first and second communications channels, respectively. The first and the second protocol commands may be responsive to the first and second application function calls, respectively. The second application function call may have a same syntax as the first application function call, and the second communications protocol may be different than the first communications protocol.