US Cellular is one of the latest to join the O-RAN Alliance, the world-wide community of more than 190 mobile operators, vendors and research and academic institutions operating in the radio access network (RAN) industry. The Alliance is focused on evolving the RAN architecture and orchestration toward open-source, rather than proprietary, implementations. In a press release, US Cellular said that an open RAN architecture can help accelerate delivery of advanced 5G capabilities to customers.