The technology described in this application increases the reliability of mobile networks. A radio communications node broadcasts a primary radio network code that indicates that subscribed mobile user equipment terminals may obtain service from a primary PLMN operator. In certain circumstances, the node may receive an instruction to broadcast a standby radio network code during a standby mode of operation. During the standby mode of operation, second mobile user equipment terminals that are not subscribed may obtain radio communications service from the primary PLMN operator.