Disclosed is an electronic device comprising: a communication module connected to an antenna capable of transmitting or receiving a signal via at least one network; and a processor electrically connected to the communication module. The processor may be configured to: in order to transmit data, transmit a signal for requesting a connection to a first network to a first base station by means of the communication module; receive a first signal, which includes timer information and is for rejecting the connection to the first network, from the first base station by means of the communication module; and if the data is of a specified type, transmit a signal for requesting a connection to a second network to a second base station before expiration of a time based on the timer information by means of the communication module. Various other embodiments understood via the specification are also possible.