An electronic device (UE1) configured to communicate over a first network (LC1) with an authentication support system and over a second network with a telecommunication system via a gateway device (GW), wherein the electronic device has no subscription for access to the second network and the gateway device has a subscription to access the second network, the subscription including a gateway device identifier (GDI) and at least one associated gateway device credential (GDC) known in the telecommunication system, and wherein the gateway device identifier and the associated at least one gateway device credential are obtainable by the authentication support system, wherein the electronic device is configured to: - provide an electronic device identifier (EDI) over the first network to the authentication support system; - receive over the first network, at least: i) a derived device identifier (DDI) obtained from the authentication support system based on at least the gateway device identifier and the electronic device identifier; ii) a derived device credential (DDC) obtained from the authentication support system based on at least the gateway device credential and the electronic device identifier; - store the derived device identifier and derived device credential in the electronic device; - include the derived device identifier received over the first network in a network access request; - transmit the network access request including the derived device identifier over the second network to the telecommunication system; - participate in an authentication procedure with the telecommunication system over the second network after transmitting the network access request and use the derived device credential in the authentication procedure with the telecommunication system. - provide an electronic device identifier (EDI) over the first network to the authentication support system; - receive over the first network, at least: i) a derived device identifier (DDI) obtained from the authentication support system based on at least the gateway device identifier and the electronic device identifier; ii) a derived device credential (DDC) obtained from the authentication support system based on at least the gateway device credential and the electronic device identifier; i) a derived device identifier (DDI) obtained from the authentication support system based on at least the gateway device identifier and the electronic device identifier; ii) a derived device credential (DDC) obtained from the authentication support system based on at least the gateway device credential and the electronic device identifier; - store the derived device identifier and derived device credential in the electronic device; - include the derived device identifier received over the first network in a network access request; - transmit the network access request including the derived device identifier over the second network to the telecommunication system; - participate in an authentication procedure with the telecommunication system over the second network after transmitting the network access request and use the derived device credential in the authentication procedure with the telecommunication system. <EOS>