• UE-> ECS (EAP-Response/AKA-Identity) • ECS -> UE (EAP-Request/AKA-Challenge) • UE -> ECS (EAP-Response/AKA-Challenge) ‘ • ECS Response to UE POST (EAP AKA Success) • Entitlement Check Request from UE-> ECS • Entitlement Check Response from ECS->UE