An electronic device comprising: a sound receiving circuit; a communication circuit; a processor operatively connected to the sound receiving circuit and the communication circuit; and a memory operatively connected to the processor, wherein the memory stores one or more instructions that, when executed, cause the processor to control the electronic device to: make a packet based call, at a first bitrate, to an external electronic device using the communication circuit; obtain communication environment information of the electronic device using the communication circuit; determine a change in the bitrate of the packet based call based on the obtained communication environment information; identify whether a voice is received through the sound receiving circuit in response to the determination of the change in the bitrate; set a timer to a first time length in response to the determination of the change in the bitrate; based on a silent section in which the voice is not received through the sound receiving circuit being identified, change the bitrate of the packet based call from the first bitrate to a second bitrate; and based on the silent section not being identified until the timer expires, change the bitrate of the packet based call from the first bitrate to the second bitrate based on the timer expiring. a sound receiving circuit; a communication circuit; a processor operatively connected to the sound receiving circuit and the communication circuit; and a memory operatively connected to the processor, wherein the memory stores one or more instructions that, when executed, cause the processor to control the electronic device to: make a packet based call, at a first bitrate, to an external electronic device using the communication circuit; obtain communication environment information of the electronic device using the communication circuit; determine a change in the bitrate of the packet based call based on the obtained communication environment information; identify whether a voice is received through the sound receiving circuit in response to the determination of the change in the bitrate; set a timer to a first time length in response to the determination of the change in the bitrate; based on a silent section in which the voice is not received through the sound receiving circuit being identified, change the bitrate of the packet based call from the first bitrate to a second bitrate; and based on the silent section not being identified until the timer expires, change the bitrate of the packet based call from the first bitrate to the second bitrate based on the timer expiring. make a packet based call, at a first bitrate, to an external electronic device using the communication circuit; obtain communication environment information of the electronic device using the communication circuit; determine a change in the bitrate of the packet based call based on the obtained communication environment information; identify whether a voice is received through the sound receiving circuit in response to the determination of the change in the bitrate; set a timer to a first time length in response to the determination of the change in the bitrate; based on a silent section in which the voice is not received through the sound receiving circuit being identified, change the bitrate of the packet based call from the first bitrate to a second bitrate; and based on the silent section not being identified until the timer expires, change the bitrate of the packet based call from the first bitrate to the second bitrate based on the timer expiring.