A network device may receive, from a first telecommunications network, one or more temporary credentials that allow access to the first telecommunications network; receive, from a user device, a request to access the first telecommunications network; provide, to a server device associated with a second telecommunications network associated with the user device, a service validation request; receive, from the server device, a service validation response indicating that the user device is permitted to access the first telecommunications network; provide, based on receiving the service validation response, a particular temporary credential, of the one or more temporary credentials, to the user device; and transmit data to or from the user device via the first telecommunications network when the particular temporary credential is used to access the telecommunications network.