Following the Huawei Mate 60 Pro, more domestic phone manufacturers are expected to support the satellite call function by the end of this year, according to supply chain sources on Tuesday. This technological breakthrough, primarily developed by Huawei and China Telecom (a state-owned telecommunication company), will charge other domestic phone makers in the form of patent licenses. Compared to traditional terrestrial signals, satellite calls have an upper limit on concurrent communication capacity. The challenge of communication capacity may increase if more phone manufacturers offer satellite call functions in the future. Currently, China Telecom holds the exclusive right to operate the Tiantong-1 satellite, which means that domestic users need to purchase a Telecom phone card to use the satellite call function of the Huawei Mate 60 Pro. [China Star Market, in Chinese]