The USA is proving to be an Open RAN hotbed, housing several of the RAN challenger vendors that will be showing off their wares at Mobile World Congress, such as Mavenir, Parallel Wireless, Airspan and JMA. It is also very active on the operator side. AT&T and Verizon may be developing their own interpretations of Open RAN rather than supporting vanilla standards, but the USA has several significant new deployers – Dish of course, but the large cablecos, led by Comcast, are also mapping out plans to deploy some of their own 5G equipment, often in CBRS spectrum, to reduce their reliance on their MVNO deals with the tier 1 operators. The USA’s politicians hope that all this activity will…