It has Auto mode, Food, Night, Panorama, Macro, Pro, Live Focus, Super Slow-mo, Slow motion and Hyperlapse as well as Pro mode to adjust ISO, shutter speed, focus, white balance and exposure manually. You can choose 64MP option from the aspect ratio settings on the top. It also has AR stickers that lets you add stickers. It also has scene optimizer, which is AI mode that automatically detects modes and you can also enable auto HDR option.
There is a Single Take feature that takes 7 photos and 3 videos with a tap for up to 10 seconds footage. The phone has partial Cam2API support and there is no RAW support for Exynos devices.
Coming to the image quality, daylight shots are way better than the M31, and the camera captures a good amount of detail, creates well exposed photos with good dynamic range and detailing, and dynamic range can further be improved enabling HDR mode from the settings, which automatically turns on HDR when needed.
Even though the phone has a 64-megapixel sensor, the final output has 16-megapixel resolution, which is common in phones with large sensors. Autofocus speeds are fast and accurate. Ultra-wide shots from the 12MP camera is good in daylight. Even though the edges look a bit curved due to the ultra-wide lens, ‘Shape Correction’ is automatically applied that automatically crop the edges, still some images look a bit curved at the corners, which is common in wide-angle lenses.
Macro shots from the main camera is good, and there is a dedicated macro mode, but there is no touch to focus option in this mode so it is hard to focus. Live focus is good at detecting the edges. Low-light performance is good, which can be improved further with Night mode that offers more details, but you need to keep your hand steady, since it takes two to three seconds to process. However, images shot using night mode are zoomed, and are captured in 8-megapixel resolution compared to 16-megapixel. 64-megapixel shots have good amount of details, but the colours are not vibrant, and the images are about 10MB in size. Images with flash is good.
The 32-megapixel front camera is good in most case. Wide-angle mode takes images in 12-megapixel resolution after pixel binning, while the normal mode takes images in 8-megapixel. Software blur in the live focus mode doesn’t have good edge detection since it blurs some parts.
It can record videos at maximum 4K resolution at 30 fps from both front and back cameras. There is also 1080p 30fps both in main and wide-angle camera, but there is no 1080p 60fps option, which is a restriction due to processor. It can shoot slow motion at 720p at 480fps and there is also super slow motion, which shoots an 8-second video with 6 seconds of slow motion, and also lets you add custom music for the slow motion part. You can also enable EIS for 1080p videos. Video quality is good, and the audio crisp since it has a secondary microphone.
The Galaxy M31s’s head SAR is 1.38 W/Kg, which is more than 1W/kg, even though the limit in India is 1.6 W/kg (over 1 g). This is way higher than the 0.383 W/Kg value in M31, so we recommended you to use a headset if you are on a long call.
The 6000mAh battery offers brilliant battery life that lasts more than a day with heavy use. With average use it lasted close to three days. I got about 8 hours of screen on time during my use with use of camera and social apps like Instagram, YouTube playback, Chrome browsing etc. mostly on Wi-Fi and occasional 4G use for close to 3 days. Adaptive battery saving and other options will let you increase the battery life, but the performance might be affected.
In our One Charge rating, the Samsung Galaxy M31 scored 18 hours and 54 minutes, which is almost same as the M31. Samsung has offered USB Type-C and 25W fast charging, an upgrade from the usual 15W chargers. Charging with the bundled charger about 1 hours and 50 minutes to reach 100% from 0%, and 0 to 50% took about 50 minutes, which is good for a phone with a 6000mAh battery.
Overall, the Galaxy M31s, is a worth upgrade to M31 at a slightly higher price compared to the predecessor. It has upgraded cameras, better Infinity-O AMOLED display and 25W fast charging while retaining the huge 6000mAh battery. Glass back, lack of splash-resistant body, Samsung Pay are few things that needs to be compromised.
The Galaxy M31s comes in Ocean Blue and Space Black colors, and now costs Rs. 20,499 for the 6GB RAM with 128GB storage and Rs. 22,499 for the 8GB RAM with 128GB storage version, compared to launch price of Rs. 19,499. It is available from Amazon.in and Samsung.com.