The Galaxy M31 has a 6.4-inch, 2340x1080 resolution Super AMOLED panel. Samsung likes to call this their Infinity U Display, due to the U-shaped notch at the top.
The Galaxy M31 runs on the same Exynos 9611 that we have seen on a few Samsung devices so far, including the Galaxy M30s. It's an octa-core chipset based on the newer but not quite the latest 10nm process. Our review unit also had 6GB of memory and 128GB of storage space.
The Galaxy M31 has a new quad camera system on the back. This includes a 64MP f1.8 primary camera with a Quad Bayer array (or as Samsung likes to call it, Tetracell). Next is an 8MP f2.2 camera for ultra-wide shots, which is identical to the one on the M30s. A new addition is the 5MP f2.4 macro camera. The fourth and final camera is a simple depth sensor for portrait images.
The Galaxy M31 is a awell-made device with a good, usable feature set and good performance. We were impressed by the overall quality of the display, the performance, the software experience and especially the terrific battery life. The 64MP camera also takes good quality pictures and this is one of those rare times where we do recommend people shoot in the full native resolution at all times.
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