Why does Microsoft charge royalties on the Android system?

Because Android system is developed by Google based on Linux system. Microsoft has a large number of patents, including nearly 100 patents on Linux. Before the birth of Android, Microsoft began to obtain patent licensing fees from Linux system. After the birth of Android, it is also an inevitable result for Microsoft to shift its charging focus to Android. According to statistics, Microsoft has about 127 patents for Android phones and tablets, most of which should be related to some irreplaceable basic functions that have been widely used in modern operating systems.

Another Android phone has to pay not only the patent license fee to Microsoft, but also the patent fee to Qualcomm.

Because Qualcomm has the necessary patents for CDMA, WCDMA and LTE wireless communication standards; The market share of CDMA, WCDMA and LTE wireless communication terminal baseband chips also exceeds 50%, which has absolute market dominance. Of course, it is a TD-SCDMA network with independent intellectual property rights in China, and there is no need to pay patent fees to Qualcomm. Although TD-LTE is different from TD-SCDMA, there are many patents in China, which are free, or offset with the FDD network patents in Qualcomm, so you will find that the three-mode mobile phone of GSM+TD-SCDMA+TD-LTE is almost free. Simply put. The virtual machine developed by Android on the basis of linux uses a large number of linux technology patents.

Microsoft has a large number of patents on linux, and Android cites many Microsoft patents.