According to various embodiments, an electronic device may comprise a communication processor; at least one RFIC connected to the communication processor; a first RFFE circuit connected to the at least one RFIC and configured to process a first signal corresponding to a first communication network; and a second RFFE circuit connected to the at least one RFIC and configured to process a second signal corresponding to a second communication network, and the communication processor may be configured to: identify a maximum frequency bandwidth that is supportable in the first communication network based on information received from the first communication network, and if the identified maximum frequency bandwidth is identified as a frequency bandwidth that is capable of being processed via the second RFFE circuit, transmit, via the second RFFE circuit, a third signal to the first communication network. Other various embodiments are possible.