A mobile terminal for supporting Rich Communication Suite (RCS) and Voice Over Long Term Evolution (VoLTE) based services is provided. The mobile terminal includes an application processor that enables a first layer of a first session connection protocol stack and transmits signaling for an RCS service to a modem processor; and the modem processor that comprises a second session connection protocol stack for connecting a session, and that transmits, to a communication network, the signaling for the RCS service transmitted through the first layer.