Samsung has announced that it has started to mass-produce DRAM chips of 16GB in size and LPDDR5 in quality. This next-gen mobile-device memory is capable of approximately 1.3 times higher speeds than the nearest LPDDR4X module made by this OEM. It may now find its way to 2020 or 2021 premium phones.
https://www.notebookcheck.net/Samsung-announces-that-its-highest-end-RAM-for-smartphones-is-nearly-here.454649.0.html