In general making an OS from scratch wasn't very successful even with Samsung (#2 maker with considerable market share and a track record) completely failed with Tizen, so a relatively younger and smaller chinese company succeeding seems dubious. Of course I would be glad for a competing mobile OS, but I would wait for benchmarks and take security statements with a grain of salt. Also, it might be completely different departments at Huawei but there's the Cisco router firmware debacle (https://www.wsj.com/articles/SB10485560675556000)