Compare phones
| Global Score | |
| 84.1 | 79.6 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 11, 10, 9.0 Pie |
| 2020-03-23 | 2019-04-10 |
| 6.26 x 2.96 x 0.35 inches | 5.69 x 2.72 x 0.31 inches |
| 6.63 ounces | 4.94 ounces |
| Midnight blue and Raven black | Black, Blue, Coral and White |
| Plastic and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 5.9 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 437 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.2 |
| Performance | |
| Exynos 9611 chipset | Exynos 7904 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, 14 nm (Octa-Core 1800 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali-G71 MP2 GPU |
| 9.27 | 8.91 |
| 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 | |
| 48.00 MP + 20.00 MP | 16.00 MP + 25.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | 27.00mm focal length |
| 0.5 inches (1/2") sensor | 0.36 inches (1/2.8") 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 | 9.46 |
| 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 | 3100mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.12 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Samsung Galaxy M21 has a general score of 84.1, which is slightly better than Galaxy A40's 79.6 score. Both phones we are comparing here include the same Android 11 OS (operating system), so both should provide you very similar OS features. Samsung Galaxy M21's body is newer than the Galaxy A40's, but it is a lot heavier and thicker.
The Samsung Galaxy M21 features just a little better hardware performance than Galaxy A40. They have 4 GB of RAM memory and the same number of cores. The Galaxy M21 counts with a slightly better looking display than Galaxy A40, because although it has a just a bit worse screen density, and they both have the same exact resolution of 1080 x 2340px, the Galaxy M21 also counts with a bit larger display.
Galaxy A40 features as much memory capacity to store more apps and games as Samsung Galaxy M21, both have exactly the same internal memory and an external memory card slot that holds a maximum of 512 GB. The Galaxy M21 has a much better camera than Galaxy A40, because although it has a smaller aperture, it also counts with a way bigger back-facing camera sensor capturing more light and vivid colors, a lot higher 3840x2160 (4K) video resolution and a way more megapixels camera in the back.
Samsung Galaxy M21 has a really longer battery lifetime than Samsung Galaxy A40, because it has a 6000mAh battery capacity instead of 3100mAh.
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