Compare phones
| Global Score | |
| 74.1 | 76.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 7.0 Nougat, 6.0 Marshmallow | Android 10 |
| 2017-01-23 | 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 |
| Aluminum | Plastic and Plastic |
| $ 190.00 | $ 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 |
| 450 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Mediatek Helio P35 chipset |
| ARM Cortex-A53, 64-bit (Octa-Core 2000 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 506 GPU | PowerVR GE8320 GPU |
| 9.09 | 9.27 |
| 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 | 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 4.1 | 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 an overall score of 76.1, which is slightly better than the Xiaomi Redmi Note 4's 74.1 global score. The Galaxy A21 design is noticeably newer and a bit thinner, but also somewhat heavier than Xiaomi Redmi Note 4. Both of these devices include Android OS, but Galaxy A21 has the older 10 version and Xiaomi Redmi Note 4 has Android 7.0 Nougat version.
Xiaomi Redmi Note 4 counts with a brighter screen than Samsung Galaxy A21, because although it has a quite smaller screen, it also counts with a greater display pixel density and a better 1080 x 1920 resolution. The Xiaomi Redmi Note 4 features just a bit bigger storage to install applications and games than Samsung Galaxy A21, because although it has a SD card slot that holds 384 GB smaller, it also counts with 32 GB more internal storage.
The Galaxy A21 features just a little better performance than Xiaomi Redmi Note 4, although it has less RAM memory, they both have a Octa-Core processor. The Galaxy A21 takes a bit better pictures and videos than Xiaomi Redmi Note 4, and although they both have the same 30 frames per second video frame rates and the same (Full HD) video definition, the Galaxy A21 also has a more mega pixels back camera and a bigger camera aperture.
The Xiaomi Redmi Note 4 counts with just a little better battery lifetime than Galaxy A21, because it has a 4100mAh battery size instead of 4000mAh.
The Samsung Galaxy A21 costs a little more than Xiaomi Redmi Note 4, but you can get a better phone for that few extra dollars.
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