Samsung has some of the best flagship smartphones on the market and available right now to buy, with the Galaxy S8, Galaxy S8+, and even the new Galaxy Note 8. Apple on the other hand, is still a little while away from unleashing its new iPhone X.
Right now, Samsung is the only company in the world that is capable of making enough OLED displays, NAND flash, and DRAM in the quantities that Apple need for the mass sales of its iPhone. This is a huge profit driver for Samsung, with The Wall Street Journal reporting that these massive orders chalk up big profits for Samsung's component business, which is around 35% of Samsung's revenue.
So when your friends say "but the iPhone X is way better than your Samsung junk", you can reply with "well, your iPhone X wouldn't even exist without Samsung" and then link them to this article. Boom.