Compare phones
| Global Score | |
| 73.1 | 88 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 8.0 Oreo | Android 11, 10 |
| 2018-07-13 | 2020-08-06 |
| 6.03 x 3.00 x 0.34 inches | 6.27 x 2.93 x 0.37 inches |
| 6.38 ounces | 7.16 ounces |
| Blue | Mirage black and Mirage blue |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 107.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1280 x 720 pixels (HD) | 2400 x 1080 pixels |
| TFT | Super AMOLED |
| 267 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.1 | 8.1 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Samsung 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 | 128 GB internal memory |
| microSDXC (up to 400 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.44 | 14.14 |
| 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 |
| -- | 1280 x 720 (480 fps) (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 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
The Galaxy M31s has a general score of 88, which is much better than the Galaxy J7 Star's general score of 73.1. The Galaxy M31s body is notably newer, but just a bit thicker and somewhat heavier than Galaxy J7 Star. Both phones in this comparison review use Android OS (operating system), but the Galaxy M31s has an older 11 version while Galaxy J7 Star has Android 9.0 Pie.
Samsung Galaxy M31s has a sharper screen than Galaxy J7 Star, because it has a bigger screen, a much higher 1080 x 2400 pixels resolution and a way better number of pixels per inch in the display. Galaxy M31s has much more storage for applications and games than Samsung Galaxy J7 Star, because it has a slot for an SD memory card that allows up to 512 GB and 96 GB more internal memory.
The Galaxy M31s counts with just a little better performance than Galaxy J7 Star, and although they both have 8 processing cores, the Galaxy M31s also has a higher amount of RAM. The Galaxy M31s features a very superior battery performance than Galaxy J7 Star, because it has 6000mAh of battery capacity instead of 3300mAh.
The Galaxy M31s features a much better camera than Galaxy J7 Star, because although it has a smaller aperture which is not nice for low light images and video, it also counts with a way better video definition, a camera with much more mega pixels and a way bigger back-facing camera sensor providing a lot higher image quality.
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