The leading US cable operators have been a less disruptive force in mobile markets than many had expected, despite the close 5G technology cooperation between the two largest, Comcast and Charter. These two firms, along with Altice USA and Cox, have launched mobile services, mainly targeting bundled services for broadband and video subscribers, but these rely on MVNO deals with large operators, and extensive offload to the cablecos’ WiFi hotspot and homespot network. Plans to buy their own spectrum or build their own small cell networks have not materialized at any scale to concern AT&T and Verizon. Comcast, for instance, spent $1.7bn on 600 MHz spectrum in 2017, and $458m on CBRS licences in 3.5 GHz in 2020, but has…