An electronic device (101, 310, 320, 400, 500, 1000) comprising: a communication module (190, 410, 510, 1010) configured to transmit or receive data by using a call channel established via a call connection to an external electronic device (310, 320, 500, 1000); and a processor (120, 420, 520, 1020), wherein the processor (120, 420, 520, 1020) is configured to: transmit, to the external electronic device (310, 320, 500, 1000), a call connection request message for establishment of the call channel between the external electronic device (310, 320, 500, 1000) and the electronic device (101, 310, 320, 400, 500, 1000); receive a response message from the external electronic device (310, 320, 500, 1000), the response message including capability information of the external electronic device (310, 320, 500, 1000) related to the call connection; on the basis of the capability information of the external electronic device (310, 320, 500, 1000), determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter (313, 343) that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device (310, 320, 500, 1000), a call connection confirmation message indicating whether to post-process the conten after decoding it; and control the communication module (190, 410, 510, 1010) to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device (101, 310, 320, 400, 500, 1000), which is related to the transmission filter (313, 343). a communication module (190, 410, 510, 1010) configured to transmit or receive data by using a call channel established via a call connection to an external electronic device (310, 320, 500, 1000); and a processor (120, 420, 520, 1020), wherein the processor (120, 420, 520, 1020) is configured to: transmit, to the external electronic device (310, 320, 500, 1000), a call connection request message for establishment of the call channel between the external electronic device (310, 320, 500, 1000) and the electronic device (101, 310, 320, 400, 500, 1000); receive a response message from the external electronic device (310, 320, 500, 1000), the response message including capability information of the external electronic device (310, 320, 500, 1000) related to the call connection; on the basis of the capability information of the external electronic device (310, 320, 500, 1000), determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter (313, 343) that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device (310, 320, 500, 1000), a call connection confirmation message indicating whether to post-process the conten after decoding it; and control the communication module (190, 410, 510, 1010) to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device (101, 310, 320, 400, 500, 1000), which is related to the transmission filter (313, 343). transmit, to the external electronic device (310, 320, 500, 1000), a call connection request message for establishment of the call channel between the external electronic device (310, 320, 500, 1000) and the electronic device (101, 310, 320, 400, 500, 1000); receive a response message from the external electronic device (310, 320, 500, 1000), the response message including capability information of the external electronic device (310, 320, 500, 1000) related to the call connection; on the basis of the capability information of the external electronic device (310, 320, 500, 1000), determine whether to pre-process a content, which is transmitted via the call connection, by using a transmission filter (313, 343) that changes a quality of the content before being encoded for transmission to the external electronic device; transmit, to the external electronic device (310, 320, 500, 1000), a call connection confirmation message indicating whether to post-process the conten after decoding it; and control the communication module (190, 410, 510, 1010) to complete establishment of the call channel, wherein the call connection request message comprises capability information of the electronic device (101, 310, 320, 400, 500, 1000), which is related to the transmission filter (313, 343).