Huawei has succeeded where Microsoft failed miserably: HarmonyOS is now on nearly a billion devices, and China’s largest mobile phone maker has eliminated Android altogether.

While Microsoft’s venture into the smartphone operating system market ultimately ended in failure, Huawei’s HarmonyOS has proven to be a huge success and a real rival to Android and iOS, at least in its home country.

The operating system is found on more than 900 million devices in China and is growing rapidly. It currently relies on Android, but Huawei has taken steps to change that.