https://www.techradar.com/news/samsung-has-built-8gb-ram-chips-and-the-galaxy-s10-could-be-first-to-benefit

While some phones such as the OnePlus 6 and Razer Phone now have 8GB of RAM, most big name manufacturers have so far stuck with 4GB or 6GB in their flagships, and that includes Samsung, but there’s evidence that it could move to 8GB soon, perhaps even for the Samsung Galaxy S10.

That’s because the company has announced it has developed 8GB RAM chips for use in phones, so they’re likely going to get used in a Samsung handset before too long and the Galaxy S10 seems an obvious candidate, as they’re sure to debut in a flagship and the Samsung Galaxy Note 9 is probably launching too soon.