There is no need to replace, first of all, mate50 this model is the use of 4G network. And this model currently does not have a particularly bright technology in it. What's more, the appearance is not as good as the previous generation of mate40pro, if you do not care about the new and old models, I suggest that it is not necessary to replace. After all, 4G and 5G in the same environment, the difference in network speed is still relatively large.