Huawei on Tuesday unveiled the Mate 70 series, its latest smartphone running on the company’s self-developed HarmonyOS NEXT operating system. This marks another step in Huawei’s drive for technological independence amid ongoing U.S. sanctions. The Mate 70 follows the release of last year’s Mate 60, a device that shocked both the tech and political landscapes. The Mate 60 featured a semiconductor that many thought would be out of Huawei’s reach due to U.S. restrictions aimed at blocking access to...