Compare phones
| Global Score | |
| 71.8 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2017-07-04 | 2020-03-23 |
| 5.76 x 2.81 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 5.64 ounces | 6.63 ounces |
| 16 777 216 | Midnight blue and Raven black |
| Metal | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 5.2 inches | 6.4 inches |
| 1280 x 720 pixels (HD) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 282 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 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 | 4 GB RAM |
| Mali-T830 MP2 GPU | Mali-G72 MP3 GPU |
| 8.73 | 9.27 |
| Storage | |
| 16 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 7.48 | 11.74 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| -- | 0.5 inches (1/2") 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 |
| 9.02 | 11.55 |
| 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 | |
| 3000mAh Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 4.96 | 7.52 |
| Other Features | |
| Bluetooth 4.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy M21 is much better than the Galaxy J5 (2017), with an 84.1 score against 71.8. Samsung Galaxy M21's construction is newer than Galaxy J5 (2017)'s, although it's thicker and heavier. Samsung Galaxy M21 features a much better screen than Samsung Galaxy J5 (2017), because it has a larger display, a higher amount of pixels per inch of screen and a much better resolution of 1080 x 2340.
Samsung Galaxy M21 features just a little better processing power than Samsung Galaxy J5 (2017), and although they both have the same number of cores, the Samsung Galaxy M21 also has a greater amount of RAM. The Galaxy M21 takes way better pictures and videos than Galaxy J5 (2017), because although it has a tinier aperture which is worse for low-light captures and video, it also counts with a camera in the back with way more megapixels and a way better video resolution.
The Galaxy M21 has a lot bigger memory for games and applications than Galaxy J5 (2017), because it has more internal memory capacity and an external memory slot that admits up to 512 GB. The Galaxy M21 counts with a superior battery lifetime than Galaxy J5 (2017), because it has a 6000mAh battery size.
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