| Global Score | |
| 77.2 | 84.1 |
| Basic Information | |
| Nokia | Samsung |
| Android 11 | Android 11, 10 |
| 2021-05-01 | 2020-03-23 |
| 6.65 x 3.14 x 0.36 inches | 6.26 x 2.96 x 0.35 inches |
| 7.76 ounces | 6.63 ounces |
| Midnight Sun and Nordic Blue | Midnight blue and Raven black |
| -- | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.7 inches | 6.4 inches |
| 1080 x 2400 pixels | 2340 x 1080 pixels |
| -- | Super AMOLED |
| 393 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 480 5G SM4350 chipset | Exynos 9611 chipset |
| Kryo 460, 64-bit, 8 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 619 GPU | Mali-G72 MP3 GPU |
| 9.18 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 11.74 |
| Camera | |
| 64.00 MP + 32.00 MP | 48.00 MP + 20.00 MP |
| -- | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| -- | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 8.8 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4470mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.32 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
The Samsung Galaxy M21 has an overall score of 84.1, which is a bit better than the Nokia X20's general score of 77.2. Both devices in this comparison include the same Android 11 OS, so they should count with identical operating system features. The Samsung Galaxy M21 is an older cellphone than the Nokia X20, but it is somewhat lighter and a bit thinner anyway.
Galaxy M21 has a little bit better hardware performance than Nokia X20, although it has 2 GB lesser RAM, they both have the same number of cores. Samsung Galaxy M21 counts with a bit better looking screen than Nokia X20, because although it has a quite lower resolution of 1080 x 2340 pixels and a little bit smaller display, it also counts with a little more pixels per inch in the display.
The Samsung Galaxy M21 captures much better photographs and videos than Nokia X20, although it has a lot less mega-pixels back facing camera. Nokia X20 features a very superior storage to store more games and applications than Samsung Galaxy M21, and although they both have an external memory card slot that holds up to 512 GB, the Nokia X20 also has 64 GB more internal storage capacity.
The Galaxy M21 features better battery duration than Nokia X20, because it has a 6000mAh battery capacity against 4470mAh.
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