| Global Score | |
| 43.9 | 48.2 |
| Basic Information | |
| Karbonn | Nokia |
| Android 4.2 | Windows Phone 7.5 Mango |
| -- | 2012-10-23 |
| -- | 4.75 x 2.56 x 0.45 inches |
| -- | 4.55 ounces |
| Black and White | Black, Blue, Red, White and Yellow |
| $ 155.00 | $ 139.00 |
| Display / Screen | |
| 5 inches | 4 inches |
| 480 x 854 pixels | 480 x 800 pixels |
| TFT | LCD |
| 196 pixels per inch | 233 pixels per inch |
| Capacitive, Multi-touch | Capacitive, Multi-touch |
| 7.3 | 7.2 |
| Performance | |
| -- | Qualcomm Snapdragon S1 MSM7227A chipset |
| Dual-Core 1000 MHz processor | ARM Cortex-A5 (Single-Core 800 MHz) processor |
| 512 MB RAM | 256 MB RAM |
| Yes GPU | Adreno 200 (enhanced) (200 MHz) GPU |
| 7.56 | 7.2 |
| Storage | |
| 4 GB internal memory | 4 GB internal memory |
| microSD, microSDHC (up to 32 GB) external memory slot | No SD card slot |
| 3.82 | 2.5 |
| Camera | |
| 5.00 MP | 5.00 MP |
| -- | f/2.40 aperture |
| -- | 28.00mm focal length |
| -- | 640 x 480 (30 fps) (VGA) video resolution |
| 5.5 | 6.93 |
| Networks | |
| Wi-Fi | Wi-Fi |
| UMTS, EDGE, GPRS and GSM | HSDPA, UMTS, EDGE, GPRS and GSM |
| SIM, Dual SIM | Micro SIM |
| 2.9 | 3.4 |
| Battery Life | |
| 2000mAh Battery | 1300mAh Li-Ion Battery |
| Removable Battery | Removable Battery |
| 400 hours standby time 7 hours talk time | 739 hours standby time 6.2 hours talk time |
| 3.92 | 3.04 |
| Other Features | |
| Bluetooth | Bluetooth 2.1, EDR |
| GPS | GPS |
| Accelerometer, Compass, Light Sensor and Proximity Sensor | Accelerometer, Light Sensor and Proximity Sensor |
| FM Radio | -- |
The Nokia Lumia 510 has a global score of 48.2, which is just a bit better than Karbonn A21+'s 43.9 general score. The Nokia Lumia 510 works with Windows Phone 7.5 Mango operating system, while Karbonn A21+ works with Android 4.2 operating system. Karbonn A21+ features just a little better hardware performance than Lumia 510, because although it has doesn't have an additional graphics processing unit, it also counts with 1 more processing cores and a greater amount of RAM memory.
The Karbonn A21+ has a bit better screen than Lumia 510, because although it has a bit less pixels per inch of screen, it also counts with a bit higher resolution of 854 x 480px and a larger screen. Lumia 510 takes much better videos and photos than Karbonn A21+. Both have a same resolution camera in the back.
The Karbonn A21+ counts with a superior storage capacity for apps and games than Lumia 510, and although they both have equal internal memory capacity, the Karbonn A21+ also has a SD memory card expansion slot that holds a maximum of 32 GB. The Karbonn A21+ counts with a very superior battery life than Lumia 510, because it has a 2000mAh battery capacity instead of 1300mAh.
Even being the best phone in our comparison, Lumia 510 is also cheaper than the Karbonn A21+, making it a very good choice.
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