Compare phones
| Global Score | |
| 74.6 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 8.0 Oreo | Android 10 |
| -- | 2020-04-27 |
| 6.04 x 3.04 x 0.32 inches | 6.27 x 2.88 x 0.34 inches |
| 6.14 ounces | 6.53 ounces |
| 16 777 216 | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Plastic | Plastic |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1280 x 720 pixels (HD) | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 267 pixels per inch | 411 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7884 chipset | MediaTek Helio P65 MT6768 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| ARM Mali-G71 GPU | Mali-G52 MC2 GPU |
| 8.82 | 9.09 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.88 | 11.74 |
| Camera | |
| 13.00 MP + 8.00 MP | 48.00 MP + 20.00 MP |
| f/1.90 aperture | f/2.00 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.02 | 10.89 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.1 | 6.7 |
| Battery Life | |
| 3000mAh Battery | 5000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| 4.96 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Galaxy A31 has a score of 81.3, which is a bit better than the Galaxy J7 Duo's global score of 74.6. Even being the best in our current comparison, Galaxy A31's design is just a bit thicker and a little bit heavier than Galaxy J7 Duo. Both of these phones have Android OS (Operating System), but Galaxy A31 has older 10 version while Galaxy J7 Duo has Android 8.0 Oreo.
Galaxy A31 has just a little better hardware performance than Galaxy J7 Duo. Both have 8 processing cores and 4 GB of RAM memory. The Galaxy A31 has a more vivid display than Galaxy J7 Duo, because it has a lot greater screen pixels density, a way higher resolution of 1080 x 2400 and a larger screen.
The Samsung Galaxy A31 has a way better camera than Samsung Galaxy J7 Duo, because although it has a tinier camera aperture which is not good for low light captures, and they both have the same video quality and the same 30 fps video frame rate, the Samsung Galaxy A31 also counts with a way higher 48 MP resolution camera and a way bigger back-facing camera sensor taking way higher quality pictures and videos.
The Galaxy A31 counts with a lot bigger memory capacity for games and applications than Galaxy J7 Duo, because it has more internal memory capacity and a SD memory slot that allows a maximum of 512 GB. Samsung Galaxy A31 counts with a way better battery lifetime than Galaxy J7 Duo, because it has a 5000mAh battery size against 3000mAh.
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