Compare phones
| Global Score | |
| 86.5 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 11, 10 |
| 2020-03-05 | 2020-03-23 |
| 6.27 x 2.96 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 6.74 ounces | 6.63 ounces |
| Black, Blue and Red | Midnight blue and Raven black |
| Plastic and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 403 pixels per inch |
| 420 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.4 | 8.4 |
| Performance | |
| Exynos 9611 chipset | Exynos 9611 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali-G72 MP3 GPU |
| 9.36 | 9.27 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 11.74 |
| Camera | |
| 64.00 MP + 32.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.59 inches (1/1.7") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 12.1 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy M31 has a general score of 86.5, which is a little bit better than the Samsung Galaxy M21's general score of 84.1. Both phones we are comparing work with the same Android 11 OS (operating system). The Galaxy M31 design has the same thickness than Samsung Galaxy M21, but it's just a little bit heavier.
Samsung Galaxy M31 has a bit better performance than Samsung Galaxy M21, and although they both have the same number of cores, the Samsung Galaxy M31 also has a higher amount of RAM memory. Galaxy M21 and Galaxy M31 have extremely similar screens, both of them have exactly the same resolution of 1080 x 2340, a display of the same size, the same brightness and the same number of pixels per inch in the screen.
Galaxy M21 has as much storage capacity to install applications and games as Samsung Galaxy M31, they have the same 64 GB internal storage and a slot for an SD memory card that allows up to 512 GB. Samsung Galaxy M31 counts with a little bit better camera than Samsung Galaxy M21, and although they both have the same video frame rate and the same 3840x2160 (4K) video definition, the Samsung Galaxy M31 also has a larger sensor providing a better image quality, a larger diafragm aperture and a much better 64 MP resolution camera.
The Galaxy M21 has a battery duration that is very similar to the battery lifetime in Samsung Galaxy M31.
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