Compare phones
| Global Score | |
| 73.5 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 9.0 Pie, 7.0 Nougat | Android 10 |
| 2017-07-01 | 2020-06-19 |
| 6.00 x 2.94 x 0.31 inches | 6.44 x 2.96 x 0.35 inches |
| 6.38 ounces | 6.77 ounces |
| Black, Gold, Rose gold and Silver | Black, Blue, Red and White |
| Aluminum | -- |
| Display / Screen | |
| 5.5 inches | 6.5 inches |
| 1920 x 1080 pixels (Full HD) | 1600 x 720 pixels |
| Super AMOLED | TFT |
| 401 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 7.9 | 7.2 |
| Performance | |
| Samsung Exynos 7 Octa 7870 chipset | Samsung Exynos 850 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 1600 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 3 GB RAM | 3 GB RAM |
| Mali-T830 MP2 GPU | Mali-G76 GPU |
| 8.73 | 9.09 |
| Storage | |
| 16 GB internal memory | 32 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 7.48 | 9.84 |
| Camera | |
| 13.00 MP + 13.00 MP | 48.00 MP + 13.00 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 | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 9.02 | 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, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 3600mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.6 | 6.8 |
| Other Features | |
| Bluetooth 4.1 | 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 |
| FM Radio | -- |
Comparison review
Samsung Galaxy A21s has a general score of 77.7, which is a little bit better than Galaxy J7 (2017)'s 73.5 overall score. The Samsung Galaxy A21s design is noticeably newer, but a little bit heavier and thicker than Galaxy J7 (2017). These phones include Android OS, but Samsung Galaxy A21s has 10 version and Galaxy J7 (2017) has Android 9.0 Pie version.
The Samsung Galaxy A21s counts with a bit better hardware performance than Samsung Galaxy J7 (2017). Both have the same RAM memory amount and 8 cpu cores. The Galaxy J7 (2017) counts with a little bit better looking display than Galaxy A21s, because although it has a little bit smaller display, it also counts with a higher display density and a better 1080 x 1920px resolution.
The Samsung Galaxy A21s has a superior memory capacity to install applications and games or saving photos and videos than Samsung Galaxy J7 (2017), because it has a SD memory card expansion slot that admits up to 512 GB and more internal memory capacity. Galaxy A21s counts with a really longer battery lifetime than Samsung Galaxy J7 (2017), because it has a 5000mAh battery capacity against 3600mAh.
The Galaxy A21s features a better camera than Galaxy J7 (2017), because although it has a tinier aperture, and they both have the same 1920x1080 video resolution and the same 30 fps video frame rate, the Galaxy A21s also counts with a way more mega-pixels back facing camera.
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