Samsung adopted heat pipes with the Galaxy S7 and has used them for cooling on S and Note flagships since. This will continue with next year's models according to sources from Samsung's supply chain, which have already started small volume production. Heat pipes add to the price so they are typically used only on flagships. Which works out fine since it's the flagships that pack the most powerful chipsets and need cooling the most. There's an alternative - vapor chambers. They are some of the best ways to transfer heat and are used in high-end GPUs (think 250W). However, they cost even...
Source: https://www.gsmarena.com/samsung_will_keep_using_heat_pipes_in_2018-news-28299.php
