Compare phones
| Global Score | |
| 74.1 | 77.7 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 7.0 Nougat, 6.0 Marshmallow | Android 10 |
| 2017-01-23 | 2020-06-19 |
| 5.94 x 2.99 x 0.33 inches | 6.44 x 2.96 x 0.35 inches |
| 5.82 ounces | 6.77 ounces |
| 16 777 216 | Black, Blue, Red and White |
| Aluminum | -- |
| $ 190.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 1600 x 720 pixels |
| IPS LCD | TFT |
| 401 pixels per inch | 270 pixels per inch |
| 450 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Samsung Exynos 850 chipset |
| ARM Cortex-A53, 64-bit (Octa-Core 2000 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 506 GPU | Mali-G76 GPU |
| 9.09 | 9.09 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 10.02 | 9.84 |
| Camera | |
| 13.00 MP + 5.00 MP | 48.00 MP + 13.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | -- |
| 9.02 | 10.78 |
| 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 - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6 | 6.8 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
The Samsung Galaxy A21s has a general score of 77.7, which is a little bit better than Xiaomi Redmi Note 4's score of 74.1. The Samsung Galaxy A21s design is much newer, but heavier and a little bit thicker than the Xiaomi Redmi Note 4. These phones use Android OS (operating system), but Samsung Galaxy A21s has the older 10 version and Xiaomi Redmi Note 4 has Android 7.0 Nougat.
Xiaomi Redmi Note 4 counts with a better display than Galaxy A21s, because although it has a bit smaller screen, it also counts with a better 1080 x 1920 resolution and a greater pixels count in each inch of screen. Galaxy A21s features a processing unit that is very similar to the Xiaomi Redmi Note 4 one, and although the Galaxy A21s has 1 GB lesser RAM memory, they both have a Octa-Core processing unit.
Xiaomi Redmi Note 4 counts with a slightly better memory capacity for applications, games, photos and videos than Galaxy A21s, because although it has a SD memory slot that supports up to 128 GB against 512 GB, it also counts with 64 GB internal storage. The Samsung Galaxy A21s has a superior camera than Xiaomi Redmi Note 4, and although they both have a same size diafragm aperture, the same 30 frames per second video frame rate and the same 1920x1080 (Full HD) video resolution, the Samsung Galaxy A21s also has a way more mega-pixels camera in the back.
The Samsung Galaxy A21s has superior battery performance than Xiaomi Redmi Note 4, because it has a 5000mAh battery size.
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