Phone Comparison - Karbonn Smart A51 vs Samsung Galaxy Star Pro S7262 vs Micromax Bolt A24
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| Manufacturer | Karbonn | Samsung | Micromax |
| Announced | September 2013 | October 2013 | January 2014 |
| Status | Available - September 2013 | Available - October 2013 | Available - January 2014 |
| Colors | White Silver | White, Gray | Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
121.2 x 62.7 x 10.6 cm (4.77 x 2.47 x 0.42 cm) |
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| Weight | - | 121 g (4.27 oz) | - |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | No | No | No |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.0 (Ice Cream Sandwich) | Android OS, v4.1.2 (Jelly Bean) | Android OS, v2.3.5 (Gingerbread) |
| Processor | 1 GHz | 1 GHz Cortex-A5 | 1 GHz, Spreadtrum SC6820 |
| GPU | - | - | - |
| RAM | 256 MB | 512 MB | 256 MB |
| Internal Memory | 512 MB (100 MB user available) | 4 GB ROM | 100 MB storage |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 16 GB |
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| Type | TFT capacitive touchscreen | TFT capacitive touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 65K colors |
| Size | 3.5 inches | 4.0 inches | 2.8 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 480 x 800 pixels (233 ppi) | 240 x 320 pixels (143 ppi) |
| Screen-to-Body Ratio | - | 60.05% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | Stereo FM radio with RDS, FM recording | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.15 MP, 2048x1536 pixels | 2 MP, 1600x1200 pixels | 0.3 MP, 640 x 480 pixels |
| Flash | LED flash | No | No |
| Features | - | Fixed Focus, Geo-tagging | - |
| Video | Yes | Yes | Yes, 640 x 480, 10 fps |
| Front Camera | Yes, VGA [Similar] | No [Similar] | No [Similar] |
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| GPRS | Yes | Yes | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps |
| Edge | Yes | Yes | Class 12 |
| 3G | No | No | No |
| Bluetooth | Yes | Yes | Yes, v2.1 |
| Wi-Fi | Wi-Fi 802.11 b/g, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot, Wi-Fi Direct | Wi-Fi 802.11 b/g/n |
| USB | Yes | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | No | No | No |
| Browser | HTML | HTML | HTML |
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| Internal | 512 MB (100 MB user available), 256 MB RAM | 4 GB ROM, 512 MB RAM | 100 MB storage, 256 MB RAM, 512 MB ROM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 16 GB |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| NFC | |
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| Type | Li-Ion Battery | Li-Ion Battery | Li-Ion Battery |
| Capacity | 1100 mAh | 1500 mAh | - |
| Stand by | - | Up to 350 h | Up to 150 h |
| Talk Time | - | Up to 15 h | Up to 4 h |
