An electronic device includes a communication processor configured to support first network communication, second network communication, and a memory configured to store information about a first band supporting dual connectivity for the first and the second network communication among a plurality of bands that correspond to the first network communication. The communication processor may be configured to: camp on a first cell supporting the first network communication; receive information about a neighbor cell from the first cell after camping on the first cell; identify a second band supporting the dual connectivity among at least one band that corresponds to the neighbor cell based on the information about the first band and the information about the neighbor cell; search for the second band among the at least one band that corresponds to the neighbor cell; and perform cell reselection from the first cell to another cell based on the search result.