Compare phones
| Global Score | |
| 72.6 | 76.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 15 | Android 10 |
| -- | 2020-06-29 |
| -- | 6.61 x 3.02 x 0.32 inches |
| -- | 6.81 ounces |
| -- | Black |
| -- | Plastic and Plastic |
| -- | $ 194.00 |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| -- | 1600 x 720 pixels |
| AMOLED | IPS LCD |
| -- | 270 pixels per inch |
| No touch screen | No touch screen |
| 2.7 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8650 (4 nm) chipset | Mediatek Helio P35 chipset |
| processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 3 GB RAM |
| Adreno 830 GPU | PowerVR GE8320 GPU |
| 6.21 | 9.27 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 9.84 |
| Camera | |
| 200.00 MP + 10.00 MP | 16.00 MP + 13.00 MP |
| -- | f/1.80 aperture |
| 0.64 inches (1/1.56") sensor | 0.33 inches (1/3.06") 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 | -- |
| 13.42 | 9.35 |
| Networks | |
| -- | Wi-Fi |
| -- | 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 |
| 7.6 | 6.7 |
| Battery Life | |
| 3050mAh Dual Nano SIM + eSIM Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.04 | 5.92 |
| 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, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy A21 has a general score of 76.1, which is just a bit better than the Galaxy S25 Slim (Rumored)'s 72.6 overall score. Both phones in our current comparison include Android operating system, but Galaxy A21 has older 10 version and Galaxy S25 Slim (Rumored) has Android 15 version. The Galaxy A21 features a much more vibrant screen than Galaxy S25 Slim (Rumored), although it has a quite smaller display.
Samsung Galaxy S25 Slim (Rumored) has a bit bigger memory capacity to install applications and games than Galaxy A21, because although it has no slot for an external memory card, it also counts with more internal memory. Samsung Galaxy A21 counts with a much better performance than Samsung Galaxy S25 Slim (Rumored), because although it has a lower amount of RAM memory, it also counts with a larger number of faster cores.
The Galaxy S25 Slim (Rumored) features a greater camera than Galaxy A21, because it has a lot higher video resolution, a lot bigger back camera sensor capturing more light and vivid colors and a way more MP back-facing camera. Galaxy A21 features improved battery life than Samsung Galaxy S25 Slim (Rumored), because it has a 31% larger battery capacity.
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