Compare phones
| Global Score | |
| 77.7 | 90.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 14 |
| 2020-06-19 | -- |
| 6.44 x 2.96 x 0.35 inches | -- |
| 6.77 ounces | -- |
| Black, Blue, Red and White | -- |
| -- | Glass (Corning Gorilla Glass) and Titanium |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.5 inches | 6.8 inches |
| 1600 x 720 pixels | 3088 x 1440 pixels |
| TFT | Dynamic AMOLED |
| 270 pixels per inch | 501 pixels per inch |
| -- | 2600 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 10.2 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 8 Gen 4 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | processor |
| 3 GB RAM | 12 GB RAM |
| Mali-G76 GPU | Yes GPU |
| 9.09 | 6.21 |
| Storage | |
| 32 GB internal memory | 256 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 13.3 |
| Camera | |
| 48.00 MP + 13.00 MP | 200.00 MP + 12.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | 24.00mm focal length |
| 0.5 inches (1/2") sensor | 0.77 inches (1/1.3") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (30 fps) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 10.78 | 14.74 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.6 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 5000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.3 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Galaxy S25 Ultra has a general score of 90.7, which is better than the Galaxy A21s's 77.7 overall score. Both devices in this comparison review work with Android OS, but Galaxy S25 Ultra has newer 14 version while Galaxy A21s has Android 10 version. Galaxy S25 Ultra's construction is incredibly thinner and incredibly lighter than the Galaxy A21s.
The Galaxy A21s features an extremely better processor than Galaxy S25 Ultra, although it has a smaller amount of RAM memory, they both have a Octa-Core processor. The Samsung Galaxy S25 Ultra features a much sharper display than Samsung Galaxy A21s, because it has a lot better 1440 x 3088 pixels resolution, a lot more pixels per inch in the screen and a little bit bigger display.
Galaxy S25 Ultra has a much greater memory for games and applications than Galaxy A21s, because although it has no slot for an SD memory card, it also counts with more internal memory. Galaxy S25 Ultra shoots way better photographs and videos than Galaxy A21s, because it has a much higher 7680x4320 video quality, a camera with way more mega pixels, a larger diafragm aperture to take better images in poorly lited environments and a much larger sensor.
The Samsung Galaxy S25 Ultra features a battery lifetime that's just as good as the battery life in Galaxy A21s.
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