If there is no problem with the phone itself, it should be a network problem

I have also encountered this situation

If you have high requirements for Internet experience, I suggest you contact the network operator Switch to China Telecom or China Unicom (China Unicom is used in the north and China Telecom is used in the south). It makes sense that non-brand networks such as Great Wall, Aipu, Tietong, etc. are cheaper because they have limited resources and the connection is not strong when accessing some web pages or applications. !