Various embodiments of the present invention relate to an apparatus and method for information sharing of a plurality of subscriber identity modules in an electronic device. The electronic device comprises a first subscriber identity module, a second subscriber identity module, a wireless communication circuit and a processor operatively connected to the first subscriber identity module, the second subscriber identity module, and the wireless communication circuit, wherein, if the electronic device is registered in a first network through the wireless communication circuit, on the basis of first subscriber identity information and/or first network configuration information of the first subscriber identity module, the processor may update, on the basis of first network configuration information, second network configuration information stored in the second subscriber identity module and perform, on the basis of the updated second network configuration information, a network search corresponding to the second subscriber identity module. Other embodiments are also possible.