Compare phones
| Global Score | |
| 84.1 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 10 |
| 2020-03-23 | 2020-06-19 |
| 6.26 x 2.96 x 0.35 inches | 6.44 x 2.96 x 0.35 inches |
| 6.63 ounces | 6.77 ounces |
| Midnight blue and Raven black | Black, Blue, Red and White |
| Plastic and Plastic | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 1600 x 720 pixels |
| Super AMOLED | TFT |
| 403 pixels per inch | 270 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.2 |
| Performance | |
| Exynos 9611 chipset | Samsung Exynos 850 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali-G72 MP3 GPU | Mali-G76 GPU |
| 9.27 | 9.09 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 9.84 |
| Camera | |
| 48.00 MP + 20.00 MP | 48.00 MP + 13.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 10.78 |
| 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 | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Samsung Galaxy M21 is slightly better than the Galaxy A21s, having an 84.1 score against 77.7. Both devices we compare here come with Android OS (operating system), but Samsung Galaxy M21 has a more recent 11 version while Galaxy A21s has Android 10, so it provides you a couple nice extra features. Samsung Galaxy M21 is a a bit lighter cellphone than the Galaxy A21s, but both are 0.35inches thick.
The Galaxy M21 features a bit superior processing unit than Galaxy A21s, and although they both have a Octa-Core processor, the Galaxy M21 also has a larger amount of RAM memory. The Samsung Galaxy M21 features a much better looking screen than Samsung Galaxy A21s, because although it has a little bit smaller display, it also counts with a much better 1080 x 2340 pixels resolution and a higher display pixels density.
Samsung Galaxy M21 has a quite bigger memory for applications, games, photos and videos than Samsung Galaxy A21s, and although they both have a slot for an external memory card that allows up to 512 GB, the Samsung Galaxy M21 also has 64 GB internal memory. Samsung Galaxy M21 has a slightly better camera than Galaxy A21s, and although they both have a same resolution camera in the back, a same size back-facing camera sensor and the same diafragm aperture, the Samsung Galaxy M21 also has a lot higher 3840x2160 (4K) video quality.
Galaxy M21 features improved battery lifetime than Samsung Galaxy A21s, because it has a 20 percent greater battery size.
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