Question: what is the difference between samsung m31 and m31s?
Answer: The Galaxy M31s sports a 6.5-inch full-HD+ Super AMOLED Infinity-O Display with the hole-punch in the top centre of the screen. The Galaxy M31, on the other hand, has a 6.4-inch full-HD+ Super AMOLED Infinity-U Display, which is commonly known as a display with waterdrop notch.