I think they are completely different. It seems Apple uses the GlobalStar LEO satllites for these communication.[0] Huawei is using BeiDou[1], which is the na

I think they are completely different. It seems Apple uses the GlobalStar LEO satllites for these communication.[0] Huawei is using BeiDou[1], which is the navigation satellite system. BeiDou is something just like GPS, but has the capability to send short text message. Huawei is using that function for SOS meesage. Basically you can expect wherever you can receive navigation signals, you can send your SOS message. [0] https://www.reuters.com/technology/apple-picks-globalstar-satellite-service-iphone-14-series-2022-09-07/ https://www.reuters.com/technology/apple-picks-globalstar-sa... [1] https://en.wikipedia.org/wiki/BeiDou https://en.wikipedia.org/wiki/BeiDou