Yes, phones, including recent iPhone models, are often cheaper on Black Friday and Cyber Monday, matching (if not beating) the level of discount you'd find during any other major shopping event. This is partly because Cyber Week occurs months after most manufacturers, such as Samsung, OnePlus, Google, and Apple, have launched new devices. With the passage of time, you'll often see the more recent phones discounted by a significant amount at this time.
We start with the Samsung Galaxy S25 flagships. In the US, it's a straight discount, so what you see is what you get. In the UK, Prime Student members can get an additional £100 off. Also note that some models have an additional 10% off at checkout. In Germany, the flagship and foldable Galaxy phones come with a free Galaxy tablet - it's a Galaxy Tab S10 FE (128GB, Wi-Fi), which is a capable mid-range slate.