Compare phones
| Global Score | |
| 71.8 | 76.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 6.0 Marshmallow | Android 10 |
| 2017-02-14 | 2020-06-29 |
| 5.94 x 2.99 x 0.33 inches | 6.61 x 3.02 x 0.32 inches |
| 5.82 ounces | 6.81 ounces |
| 16 777 216 | Black |
| Metal | Plastic and Plastic |
| $ 145.00 | $ 194.00 |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 1600 x 720 pixels |
| IPS LCD | IPS LCD |
| 401 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Mediatek Helio P35 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 3 GB RAM |
| Adreno 506 GPU | PowerVR GE8320 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 32 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.12 | 9.84 |
| Camera | |
| 13.00 MP + 5.00 MP | 16.00 MP + 13.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| -- | 0.33 inches (1/3.06") 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 | 9.35 |
| 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 |
| 6.1 | 6.7 |
| Battery Life | |
| 4100mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6 | 5.92 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy A21 has a global score of 76.1, which is just a bit better than the Xiaomi Redmi Note 4X's 71.8 score. Although Galaxy A21 is somewhat heavier than Xiaomi Redmi Note 4X, it's a bit thinner and much newer. Both of these devices have Android OS, but Galaxy A21 has older 10 version while Xiaomi Redmi Note 4X has Android 6.0 Marshmallow.
The Samsung Galaxy A21 counts with just a little better processing power than Xiaomi Redmi Note 4X. They have the same number of cores and a 3 GB RAM memory. Xiaomi Redmi Note 4X features a bit sharper screen than Samsung Galaxy A21, because although it has a quite smaller screen, it also counts with a better pixel count in each inch in the screen and a better resolution of 1080 x 1920.
Samsung Galaxy A21 captures slightly better pictures and videos than Xiaomi Redmi Note 4X, and although they both have the same video frame rates and the same 1920x1080 (Full HD) video definition, the Samsung Galaxy A21 also has a better resolution back camera and a bigger camera aperture. The Galaxy A21 has a much greater memory capacity for applications, games, photos and videos than Xiaomi Redmi Note 4X, and although they both have the same internal storage capacity, the Galaxy A21 also has a SD extension slot that allows a maximum of 512 GB.
The Xiaomi Redmi Note 4X features just a little bit longer battery life than Galaxy A21, because it has a 4100mAh battery capacity.
Samsung Galaxy A21 is more expensive than the Xiaomi Redmi Note 4X, but you can get a better phone for that extra money.
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