Compare phones
| Global Score | |
| 73.1 | 86.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 11, 10 |
| 2018-07-13 | 2020-03-05 |
| 6.03 x 3.00 x 0.34 inches | 6.27 x 2.96 x 0.35 inches |
| 6.38 ounces | 6.74 ounces |
| Blue | Black, Blue and Red |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 107.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.4 inches |
| 1280 x 720 pixels (HD) | 2340 x 1080 pixels |
| TFT | Super AMOLED |
| 267 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.1 | 8.4 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Exynos 9611 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 2 GB RAM | 6 GB RAM |
| Mali-T830 MP1 GPU | Mali-G72 MP3 GPU |
| 8.73 | 9.36 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 11.74 |
| Camera | |
| 13.00 MP + 13.00 MP | 64.00 MP + 32.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 28.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.59 inches (1/1.7") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.13 | 12.1 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 6.6 | 6.7 |
| Battery Life | |
| 3300mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.28 | 7.52 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy M31 is better than the Samsung Galaxy J7 Star, with a overall score of 86.5 against 73.1. Both phones in this comparison review use Android operating system, but the Galaxy M31 has the older 11 version and Samsung Galaxy J7 Star has Android 9.0 Pie. The Galaxy M31 is a newer phone than the Samsung Galaxy J7 Star, although it's a little thicker and just a bit heavier.
Galaxy M31 has a brighter screen than Galaxy J7 Star, because it has a larger screen, a much higher resolution of 1080 x 2340px and a lot better pixels density. The Samsung Galaxy M31 features a bit more powerful processing unit than Galaxy J7 Star, and although they both have a Octa-Core processor, the Samsung Galaxy M31 also has 4 GB more RAM memory.
The Samsung Galaxy M31 features a way better camera than Galaxy J7 Star, because although it has a smaller aperture which is not so good for capturing photos and videos in low-light environments, it also counts with a lot better 64 mega pixels resolution back camera, a much bigger sensor shooting way better quality photos and a way better 3840x2160 (4K) video quality.
Galaxy M31 counts with a way bigger memory capacity to install applications and games or saving photos and videos than Galaxy J7 Star, because it has 64 GB internal memory capacity and a slot for external memory cards that admits up to 512 GB. The Galaxy M31 features a superior battery life than Samsung Galaxy J7 Star, because it has a 6000mAh battery capacity instead of 3300mAh.
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