The UE 200 may pre-configure a list of SNPN IDs including identifies of SNPN operators (SNPN IDs) contracting to provide onboarding with a manufacturer to select a network for providing onboarding. The SNPN ID may be configured in the form of PLMN ID+NID. Alternatively, the UE 200 may preconfigure a DCS group ID that is a group ID of the SNPN operators contracting to provide an onboarding service. The DCS group may be a group formed by prior agreement between the SNPN operators. The DCS group may be a group classified according to related types of business of SNPN operators or DCS server-owning operators. The DCS group ID may include a PLMN ID and an NID in the form of an SNPN ID, and may include at least one of location information, geographical information, or national code information (a mobile country code (MCC) or a mobile network code (MNC)). In an embodiment of the disclosure, the list of SNPN IDs or DCS GROUP IDs preconfigured in the UE 200 may be updated by the SNPN network.

At operation 2, the UE 200 may discover and select an O-SNPN network based on received broadcast system information. The UE 200 may transmit a unique UE identity and a default UE credential to the SNPN network because of absence of user subscription data regarding the SNPN network, in a network selection operation. The UE 200 may transmit information such as an application identifier or a service provider identifier.