Huawei files to trademark mobile OS around the world after US ban

China's Huawei has applied to trademark its "Hongmeng" operating system (OS) in at least nine countries and Europe, data from a U.N. body shows, in a sign it may be deploying a back-up plan in key markets as U.S. sanctions threaten its business model. If you need to make your own operating system in the current market, you've already lost. Huawei is in a very deep hole.