A method of operating a first electronic device for improving call quality is provided. The method includes the operations of transmitting call data received through a first call between the first electronic device and a third electronic device to a second electronic device, using short-range wireless communication connected with the second electronic device, if a communication abnormality of the short-range wireless communication takes place, connecting a second call between the first electronic device and the second electronic device, generating a third call by merging the first call and the second call, and releasing a call connection of the first electronic device from the third call.