US Patent 11856470 Registration request indicating failure of network

A base station of a first public land mobile network (PLMN) transmits, to a wireless device, an indication of a failure of a second PLMN comprising a PLMN identifier of the second PLMN. The base station receives, from the wireless device, a registration request indicating the failure of the second PLMN. The registration request comprises one or more of a subscriber concealed identifier (SUCI) or a permanent equipment identifier (PEI) of the wireless device. The registration request comprises the PLMN identifier of the second PLMN.