Systems, devices, and automated processes for user equipment (UE) to access network slices at cell sites. An example process includes receiving a registration request from the UE. The registration request includes a list of network slices for access at network cells within range of the UE. The UE is authenticated to the network to identify subscription information of the UE. A list of slice identifications (IDs) available to the UE is transmitted to the UE. A slice-specific authentication of the UE is initiated for a slice identified as available based on the subscription information. The UE is allowed to access the slice in response to the slice-specific authentication.