A method for enabling an establishment of a connection between a wireless device and a target core network via an access node of a standalone Long Term Evolution, LTE, radio access network, RAN, using an unlicensed frequency band, the method being performed by the access node and comprising: - transmitting a broadcast message in a cell served by the access node, the broadcast message indicating that the access node supports connectivity to at least one core network associated with another RAN than the standalone LTE RAN, wherein the broadcast message comprises a mobile network identity which is pre-defined to indicate that the access node supports connectivity to the at least one core network associated with the another RAN than the standalone LTE RAN; - receiving a request for information related to an at least one core network to which the access node provides connectivity, wherein the request for the information is received from the wireless device; - retrieving the requested information from the at least one core network; - transmitting the requested information to the wireless device for allowing the wireless device to select the target core network based on the requested information, wherein the requested information comprises at least one of a quality of service provided by the at least one core network and a type of subscription provided by the at least one core network, and wherein the target core network is from the at least one core network associated with the another RAN than the standalone LTE RAN; - receiving a request to attach, from the wireless device in the cell served by the access node, for establishing a secure connection for user data between the wireless device and the target core network via the access node, wherein the request to attach comprises an identity of a target network associated with the target core network, and wherein if the request to attach does not comprise the identity of the target network, then selecting the target core network based on at least one of: a type of subscription of the wireless device, the quality of service provided by the at least one core network, and the type of subscription provided by the at least one core network, wherein the quality of service provided by the at least one core network and the type of subscription provided by the at least one core network are received from the at least one core network upon receiving the request for the information related to the at least one core network to which the access node provides connectivity; and - transmitting a request to a node of the selected target core network to establish the secure connection. - transmitting a broadcast message in a cell served by the access node, the broadcast message indicating that the access node supports connectivity to at least one core network associated with another RAN than the standalone LTE RAN, wherein the broadcast message comprises a mobile network identity which is pre-defined to indicate that the access node supports connectivity to the at least one core network associated with the another RAN than the standalone LTE RAN; - receiving a request for information related to an at least one core network to which the access node provides connectivity, wherein the request for the information is received from the wireless device; - retrieving the requested information from the at least one core network; - transmitting the requested information to the wireless device for allowing the wireless device to select the target core network based on the requested information, wherein the requested information comprises at least one of a quality of service provided by the at least one core network and a type of subscription provided by the at least one core network, and wherein the target core network is from the at least one core network associated with the another RAN than the standalone LTE RAN; - receiving a request to attach, from the wireless device in the cell served by the access node, for establishing a secure connection for user data between the wireless device and the target core network via the access node, wherein the request to attach comprises an identity of a target network associated with the target core network, and wherein if the request to attach does not comprise the identity of the target network, then selecting the target core network based on at least one of: a type of subscription of the wireless device, the quality of service provided by the at least one core network, and the type of subscription provided by the at least one core network, wherein the quality of service provided by the at least one core network and the type of subscription provided by the at least one core network are received from the at least one core network upon receiving the request for the information related to the at least one core network to which the access node provides connectivity; and - transmitting a request to a node of the selected target core network to establish the secure connection.