| Global Score | |
| 41.9 | 78.2 |
| Basic Information | |
| Karbonn | Samsung |
| Android 4.0 | Android 4.4.2, 4.3, 4.2.2 |
| -- | 2013-03-14 |
| -- | 5.38 x 2.75 x 0.31 inches |
| -- | 4.62 ounces |
| White | Black, Blue, Red and White |
| -- | Polycarbonate |
| -- | Scratch-Resistant Glass |
| $ 155.00 | $ 155.00 |
| Display / Screen | |
| 4.5 inches | 5 inches |
| 480 x 800 pixels | 1080 x 1920 pixels (Full HD) |
| -- | Super AMOLED |
| 207 pixels per inch | 441 pixels per inch |
| Capacitive, Multi-touch | Capacitive, Multi-touch |
| 7 | 9.1 |
| Performance | |
| -- | Qualcomm Snapdragon 800 (8974) chipset |
| Dual-Core 1200 MHz processor | Krait 400 (Quad-Core 2300 MHz) processor |
| -- | 2 GB (800 MHz) RAM |
| GPU | Adreno 330 (450 MHz) GPU |
| 7.65 | 9.27 |
| Storage | |
| 4 GB internal memory | 32 GB internal memory |
| microSD, microSDHC (up to 32 GB) external memory slot | microSD, microSDHC, microSDXC (up to 64 GB) external memory slot |
| 3.82 | 7.56 |
| Camera | |
| 5.00 MP + 1.30 MP | 13.00 MP + 2.00 MP |
| -- | f/2.20 aperture |
| -- | 31.00mm focal length |
| -- | 0.33 inches (1/3.06") sensor |
| -- | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 6.05 | 9.02 |
| Networks | |
| Wi-Fi | Wi-Fi |
| -- | Mobile Hotspot |
| HSDPA, UMTS, EDGE, GPRS and GSM | LTE (4G), HSPA+ (4G), HSDPA, HSUPA, UMTS, EDGE, GPRS and GSM |
| SIM, Dual SIM | Micro SIM |
| 3.4 | 7 |
| Battery Life | |
| 1800mAh Battery | 2600mAh Li-Ion Battery |
| Removable Battery | Removable Battery |
| -- | Wireless Charging |
| 200 hours standby time 5 hours talk time | 17 hours talk time |
| 3.68 | 4.56 |
| Other Features | |
| Bluetooth | Bluetooth 4.0 |
| GPS | GPS |
| -- | NFC |
| -- | Infra-red port |
| -- | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| Digital TV Broadcast | -- |
Samsung Galaxy S4 is much better than the Karbonn A21, with a 78.2 score against 41.9. Both of these phones come with Android OS (operating system), but the Samsung Galaxy S4 has 4.4.2 version while Karbonn A21 has Android 4.0 version. The Galaxy S4 features a way better performance than Karbonn A21, because it has a larger number of cores and a graphics processor.
The Galaxy S4 has a much sharper screen than Karbonn A21, because it has a way better screen density, a lot higher 1920 x 1080 pixels resolution and a little larger screen. Galaxy S4 has a much better camera than Karbonn A21, because it has a way higher 13 MP resolution back camera. The Samsung Galaxy S4 counts with a much better storage capacity for applications, games, photos and videos than Karbonn A21, because it has 32 GB internal memory capacity and an external memory card slot that allows up to 64 GB.
The Galaxy S4 features a much better battery life than Karbonn A21, because it has 2600mAh of battery capacity.
Galaxy S4 and the Karbonn A21 cost the same.
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