Does Meizu mobile phone need a patent?

Meizu's mobile phone has always used MediaTek's chips instead of Qualcomm's chips. Why do you need to pay Qualcomm the patent fee? This sentence sounds convincing on the surface, but it's not like that at all. The statement of "not relying on Qualcomm chips" seems simple. In a word, Meizu didn't use Qualcomm chips, but it still used Qualcomm's standard necessary patented technology. Because there are a large number of standard necessary patents in 3G and 4G wireless communication technologies, it can be said that as long as the mobile phone you design supports 3G/4G networks in China, you will definitely use Qualcomm's patents. MediaTek had previously reached a cross-licensing agreement with Qualcomm, so MediaTek was authorized by Qualcomm for free. However, according to the agreement, MediaTek's ODM, OEM and other partners need to pay authorization fees to Qualcomm, and MediaTek's partners must have authorization from Qualcomm. Therefore, even mobile phone terminal manufacturers using MediaTek chips need to pay Qualcomm.