Then the question is, if Huawei HarmonyOS system is open source, will other domestic mobile phones be used? This answer may be cruel because other domestic mobile phone manufacturers may not use it. The reason is simple, because other domestic mobile phone manufacturers have signed relevant agreements with Google. If they use the HarmonyOS system, they will violate the relevant agreement with Google.
Moreover, in addition to violating the relevant agreement with Google, if domestic mobile phone manufacturers use the HarmonyOS system, then these domestic mobile phone manufacturers will declare their opposition to Google. After all, Google will never allow HarmonyOS to surpass itself. Therefore, as long as domestic mobile phone manufacturers use HarmonyOS system, Google will definitely restrict these manufacturers.
As we all know, when Google announced that it would suspend its cooperation with Huawei, although Huawei had its own system, many people still thought that the sales of Huawei's mobile phones would plummet, because if Huawei fell out with Google, Google's software would not be used by Huawei, so foreign users might stop buying Huawei's mobile phones for this reason.
Over the years, Google has been challenged by many mobile phone systems, but it has not been defeated. It is because Google has a very complete ecological chain, and Huawei's ecological chain in HarmonyOS is not very complete, so even if Huawei opens its source, it may not be supported by domestic mobile phone manufacturers. Of course, this does not mean that there will be no support in the future. If Huawei completes the ecological chain in the future and the system is getting better and better, it is estimated that there will be many mobile phone manufacturers to support it.