Compare phones
| Global Score | |
| 73.9 | 77.7 |
| Basic Information | |
| Oppo | Samsung |
| Android 10, 9.0 Pie | Android 10 |
| 2019-10-18 | 2020-06-19 |
| 6.30 x 2.93 x 0.37 inches | 6.44 x 2.96 x 0.35 inches |
| 6.67 ounces | 6.77 ounces |
| Luminous black, Ocean blue and Sunset pink | Black, Blue, Red and White |
| Aluminum and Glass (Corning Gorilla Glass 5) | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 2400 x 1080 pixels | 1600 x 720 pixels |
| AMOLED | TFT |
| 405 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 730G SM7150-AB chipset | Samsung Exynos 850 chipset |
| Kryo 470, 64-bit, 8 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 8 GB RAM | 3 GB RAM |
| Adreno 618 GPU | Mali-G76 GPU |
| 9.27 | 9.09 |
| Storage | |
| 256 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 17.34 | 9.84 |
| Camera | |
| 48.00 MP + 16.00 MP | 48.00 MP + 13.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 28.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (60 fps) (Full HD) slow motion video | -- |
| 11.55 | 10.78 |
| 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 | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
The Galaxy A21s is just a bit better than OPPO Reno2, having a score of 77.7 against 73.9. Both phones in this review come with the same Android 10 OS (operating system). Even though the Galaxy A21s and OPPO Reno2 were released with only a few months difference, Galaxy A21s's design is a little thinner but also just a little heavier.
OPPO Reno2 counts with a better looking display than Galaxy A21s, and although they both have a screen of the same size, the OPPO Reno2 also has a lot higher resolution of 1080 x 2400px and a greater display pixels density. OPPO Reno2 features a lot bigger memory capacity to install applications and games or saving photos and videos than Samsung Galaxy A21s, and although they both have an external memory slot that supports a maximum of 512 GB, the OPPO Reno2 also has 256 GB internal storage capacity.
OPPO Reno2 has a little bit better processing power than Samsung Galaxy A21s, and although they both have the same number of cores, the OPPO Reno2 also has 5 GB more RAM memory. The OPPO Reno2 has a slightly better camera than Samsung Galaxy A21s, and although they both have a back facing camera with a 48 MP resolution and a 0.5 inches sensor, the OPPO Reno2 also has a bigger diafragm aperture to capture better photography in low-light environments and a lot higher (4K) video resolution.
The Samsung Galaxy A21s counts with greater battery performance than OPPO Reno2, because it has a 5000mAh battery size.
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