A 5th generation (5G) or 6th generation (6G) communication system for supporting a higher data transfer rate beyond a 4th generation (4G) communication system, such as a long term evolution (LTE) system and a method for supporting, by a first terminal, switching between a plurality of modes for a call is provided. The method includes performing a capability negotiation for a call with a second terminal, and establishing a first connection between the first terminal and a call server according to a first mode among the plurality of modes for the call with the second terminal after performing the capability negotiation, wherein the performing of the capability negotiation includes transmitting a first message including information indicating a media attribute of each of two or more modes of the plurality of modes to the call server.