A mobile device is provided. The mobile device includes a memory configured to store a plurality of applications, a communication circuit including a first communication module and a second communication module, and a processor electrically connected with the communication circuit. The processor is configured to execute an application among the plurality of applications, determine a communication state of the first network and a communication state of the second network in response to executing the application, select one of the first network and the second network based on the communication state of the first network, the communication state of the second network, a tariff applied to the mobile device, a service policy applied to the application, performance criteria applied to the application, and network selection criteria, and download data from a server associated with the application using the selected network.