Compare phones
| Global Score | |
| 90.7 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 14 | Android 10 |
| -- | 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 | |
| 6.8 inches | 6.5 inches |
| 3088 x 1440 pixels | 1600 x 720 pixels |
| Dynamic AMOLED | TFT |
| 501 pixels per inch | 270 pixels per inch |
| 2600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 10.2 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 8 Gen 4 chipset | Samsung Exynos 850 chipset |
| processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 12 GB RAM | 3 GB RAM |
| Yes GPU | Mali-G76 GPU |
| 6.21 | 9.09 |
| Storage | |
| 256 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 13.3 | 9.84 |
| Camera | |
| 200.00 MP + 12.00 MP | 48.00 MP + 13.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 24.00mm focal length | 26.00mm focal length |
| 0.77 inches (1/1.3") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (30 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 14.74 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.6 | 6.7 |
| Battery Life | |
| 5000mAh Li - Ion Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 6.8 | 6.8 |
| Other Features | |
| Bluetooth 5.3 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
Samsung Galaxy S25 Ultra is much better than the Samsung Galaxy A21s, having a 90.7 score against 77.7. Samsung Galaxy S25 Ultra is a way thinner and extremely lighter phone than the Samsung Galaxy A21s. Both phones we compare here work with Android operating system, but Samsung Galaxy S25 Ultra has 14 version while Samsung Galaxy A21s has Android 10 version, giving a couple additional features and performance enhancements.
Samsung Galaxy S25 Ultra features a much sharper screen than Galaxy A21s, because it has a much higher display pixels density, a little bit bigger display and a way better resolution of 1440 x 3088 pixels. The Galaxy S25 Ultra has much more memory for applications and games than Galaxy A21s, because although it has no external SD slot, it also counts with more internal storage capacity.
Galaxy A21s has a way better hardware performance than Samsung Galaxy S25 Ultra, although it has a smaller amount of RAM, they both have 8 CPU cores. The Galaxy S25 Ultra counts with a lot better camera than Galaxy A21s, because it has a larger camera aperture, a back facing camera with way more mega pixels, a lot larger camera sensor taking more light and vivid colors and a way higher video resolution.
The Galaxy A21s and Galaxy S25 Ultra feature quite similar batteries.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.