A method for setting up and operating a dedicated network in a mobile communications network based on an inter-operator blockchain network, IOBN, comprising at least four IOBN nodes (310a, 310b, 410, 510), the method comprising the following steps: (a) storing SIM card information of at least one qualified device and further data which are shared by at least two mobile network operators, MNOs, in a distributed ledger, wherein the SIM card information includes at least identification information and AAA information for authorization to the dedicated network; (b) replicating, based on principles of the blockchain technology, the further data and SIM card information on the IOBN nodes (310a, 310b, 410, 510), wherein in each of the MNOs at least one of the IOBN nodes (310a, 310b, 410, 510) is realized in a central infrastructure (400, 500) of the respective MNO and at predetermined edge locations (300a, 300b) of the mobile communications network of the respective MNO; (c) identifying the qualified device based on the SIM card information by one of the IOBN nodes (310a, 310b, 410, 510); (d) providing infrastructure, hardware, software and network resources which are configured to set up the dedicated network with low latency and high bandwidth starting from the identified IOBN node (310a, 310b, 410, 510) to the qualified device; and (e) establishing a data connection to the dedicated network starting from one of the edge locations (300a, 330b) with the identified IOBN node (310a, 310b), wherein the data connection to the dedicated network is set up starting from one of the used edge locations if the latter comprises an IOBN node (310a, 310b) or starting from the closest edge location which comprises an IOBN node (310a, 310b). (a) storing SIM card information of at least one qualified device and further data which are shared by at least two mobile network operators, MNOs, in a distributed ledger, wherein the SIM card information includes at least identification information and AAA information for authorization to the dedicated network; (b) replicating, based on principles of the blockchain technology, the further data and SIM card information on the IOBN nodes (310a, 310b, 410, 510), wherein in each of the MNOs at least one of the IOBN nodes (310a, 310b, 410, 510) is realized in a central infrastructure (400, 500) of the respective MNO and at predetermined edge locations (300a, 300b) of the mobile communications network of the respective MNO; (c) identifying the qualified device based on the SIM card information by one of the IOBN nodes (310a, 310b, 410, 510); (d) providing infrastructure, hardware, software and network resources which are configured to set up the dedicated network with low latency and high bandwidth starting from the identified IOBN node (310a, 310b, 410, 510) to the qualified device; and (e) establishing a data connection to the dedicated network starting from one of the edge locations (300a, 330b) with the identified IOBN node (310a, 310b), wherein the data connection to the dedicated network is set up starting from one of the used edge locations if the latter comprises an IOBN node (310a, 310b) or starting from the closest edge location which comprises an IOBN node (310a, 310b).