Compare phones
| Global Score | |
| 72.2 | 76.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 4.3, 4.2, 4.1, 4.0.4 | Android 10 |
| 2012-06-04 | 2020-06-29 |
| 5.38 x 2.78 x 0.34 inches | 6.61 x 3.02 x 0.32 inches |
| 4.73 ounces | 6.81 ounces |
| Blue, Red and White | Black |
| Polycarbonate | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| $ 585.00 | $ 194.00 |
| Display / Screen | |
| 4.8 inches | 6.5 inches |
| 720 x 1280 pixels (HD) | 1600 x 720 pixels |
| Super AMOLED | IPS LCD |
| 306 pixels per inch | 270 pixels per inch |
| Capacitive, Multi-touch | No touch screen |
| 8.2 | 7.3 |
| Performance | |
| Qualcomm Snapdragon S4 Plus MSM8960 chipset | Mediatek Helio P35 chipset |
| Krait (Dual-Core 1500 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 2 GB (500 MHz) RAM | 3 GB RAM |
| Adreno 225 (400 MHz) GPU | PowerVR GE8320 GPU |
| 8.46 | 9.27 |
| Storage | |
| 16 GB internal memory | 32 GB internal memory |
| microSD, microSDHC, microSDXC (up to 64 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 6.16 | 9.84 |
| Camera | |
| 8.00 MP + 1.90 MP | 16.00 MP + 13.00 MP |
| f/2.60 aperture | f/1.80 aperture |
| 0.33 inches (1/3") sensor | 0.33 inches (1/3.06") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 8.47 | 9.35 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, UMTS, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM |
| 7 | 6.7 |
| Battery Life | |
| 2100mAh Li-Ion Battery | 4000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 199 hours standby time 8 hours talk time | -- |
| 4 | 5.92 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Galaxy A21 is slightly better than Galaxy S III AT&T, with a 76.1 score against 72.2. Both devices in this comparison review have Android OS, but Galaxy A21 has newer 10 version and Galaxy S III AT&T has Android 4.3 version, so it provides you a lot of extra features and performance optimizations. The Galaxy A21 design is newer and just a little bit thinner than the Galaxy S III AT&T's, although it's notably heavier.
Galaxy A21 counts with a little faster processing unit than Galaxy S III AT&T, because although it has doesn't have an additional graphics processor, it also counts with a higher amount of RAM memory and 6 more processing cores. The Samsung Galaxy S III AT&T features a better screen than Galaxy A21, because although it has a lot smaller screen and a bit worse resolution of 1280 x 720 pixels, it also counts with a little bit more pixels per inch of screen.
The Samsung Galaxy A21 has a superior camera than Galaxy S III AT&T, because although it has a tinier back camera sensor shooting worse quality images and videos, and they both have the same video frame rate and the same video quality, the Samsung Galaxy A21 also counts with a much bigger aperture to take better images and video in low-light environments and a lot better resolution camera in the back.
The Samsung Galaxy A21 features a much greater storage capacity for applications, games, photos and videos than Samsung Galaxy S III AT&T, because it has a slot for SD memory cards that admits up to 512 GB and 16 GB more internal storage. Galaxy A21 has a very superior battery duration than Galaxy S III AT&T, because it has a 90% bigger battery capacity.
Samsung Galaxy A21 is not only the best phones in our comparison, but it's also by far the cheapest one, which makes this phone a great choice.
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