Compare phones
| Global Score | |
| 71.7 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 6.0 Marshmallow | Android 11, 10 |
| 2016-11-07 | 2020-03-23 |
| 5.56 x 2.74 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 5.50 ounces | 6.63 ounces |
| 16 777 216 | Midnight blue and Raven black |
| Metal | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 133.00 | -- |
| Display / Screen | |
| 5 inches | 6.4 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 441 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.2 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit (Octa-Core 2000 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Adreno 506 GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.12 | 11.74 |
| Camera | |
| 13.00 MP + 5.00 MP | 48.00 MP + 20.00 MP |
| f/2.20 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 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 |
| LTE-A (4G), LTE (4G) and HSPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 4100mAh Li - Ion Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| 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 M21 is much better than the Xiaomi Redmi 4 Prime, with an 84.1 score against 71.7. Both phones in this review work with Android OS (operating system), but Galaxy M21 has 11 version while Xiaomi Redmi 4 Prime has Android 6.0 Marshmallow. Galaxy M21's body has the same thickness than Xiaomi Redmi 4 Prime, but it's somewhat heavier.
The Galaxy M21 counts with a bit superior processing unit than Xiaomi Redmi 4 Prime, and although they both have the same number of cores, the Galaxy M21 also has a larger amount of RAM. The Samsung Galaxy M21 counts with a little more vivid display than Xiaomi Redmi 4 Prime, because although it has a little lower screen pixels density, it also counts with a larger display and a slightly better 1080 x 2340 resolution.
The Galaxy M21 takes a lot better photographs and videos than Xiaomi Redmi 4 Prime, because it has a much higher video resolution, a back camera with a much better resolution and a bigger aperture to take better photos and videos in poorly lited environments. The Galaxy M21 has a way bigger storage for apps and games than Xiaomi Redmi 4 Prime, because it has an external memory slot that admits up to 512 GB and 64 GB internal memory.
Galaxy M21 has a very superior battery life than Xiaomi Redmi 4 Prime, because it has a 46% more battery size.
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