This is a joke right? Not even 10 years ago the first phones with 4GB RAM came out, today there are quite a few phones with 24GB. At that rate we'll be at 512GB by around 2040.
Phones with 4gb ram is not feasible today because they wouldnt be able to run Android and phone home comfortably, even being a thin client requires running Android and react application on electron. 4gb is not good.
In 2040 phones will came out with the bare minimum to run Android, all the stupid Chinese apps Android distro pushes into consumers, and a react application on electron.