On 9 October 2018, the Spanish Supreme Court (Tribunal Supremo)1 upheld the Spanish High Court (Audiencia Nacional) ruling2 which dismissed the judicial appeal of British Telecommunication, PLC and BT España Compañía de Servicios Globales de Telecomunicaciones S.A.U. (both BT) against the decision3 of the Spanish Competition Authority (CNMC) in the Mobile Calls (Llamadas Móviles) case.