Phone Comparison - Karbonn Smart A51 vs Samsung Galaxy Star Pro S7262 vs Samsung I9506 Galaxy S4
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| Manufacturer | Karbonn | Samsung | Samsung |
| Announced | September 2013 | October 2013 | Q3 2013 |
| Status | Available - September 2013 | Available - October 2013 | Available - Q3 2013 |
| Colors | White Silver | White, Gray | White Frost, Black Mist / Arctic Blue, Red Aurora |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
121.2 x 62.7 x 10.6 cm (4.77 x 2.47 x 0.42 cm) |
136.6 x 69.8 x 7.9 mm (5.38 x 2.75 x 0.31 in) |
| Weight | - | 121 g (4.27 oz) | 130 g (4.59 oz) |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 CDMA2000 1xEV-DO |
| 3G Network | No | No | HSDPA 850 / 900 / 1900 / 2100 HSDPA |
| 4G Network | - | - | LTE 800 / 850 / 900 / 1800 / 2100 / 2600 |
| 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, v4.2.2 (Jelly Bean) |
| Processor | 1 GHz | 1 GHz Cortex-A5 | Quad-core 2.3 GHz Krait 400, Qualcomm MSM8974 Snapdragon 800 |
| GPU | - | - | Adreno 330 |
| RAM | 256 MB | 512 MB | 2 GB |
| Internal Memory | 512 MB (100 MB user available) | 4 GB ROM | 16/32 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 64 GB |
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| Type | TFT capacitive touchscreen | TFT capacitive touchscreen | Super AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 4.0 inches | 5.0 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 480 x 800 pixels (233 ppi) | 1080 x 1920 pixels (441 ppi) |
| Screen-to-Body Ratio | - | 60.05% | 72.15% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | Stereo FM radio with RDS, FM recording | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.15 MP, 2048x1536 pixels | 2 MP, 1600x1200 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED flash | No | LED flash |
| Features | - | Fixed Focus, Geo-tagging | Auto focus, Dual Shot, Simultaneous HD Video And Image Recording, Geo-tagging, Touch Focus, Face And Smile Detection, Image Stabilization, HDR |
| Video | Yes | Yes | Yes, 1080p@30fps, dual-video rec. |
| Front Camera | Yes, VGA [Similar] | No [Similar] | Yes, 2 MP,1080p@30fps, dual video call [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | No | No | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes | Yes | Yes, v4.0 with A2DP, EDR, LE |
| 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 a/b/g/n/ac, dual-band, DLNA, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes | Yes, microUSB v2.0 | Yes, microUSB v2.0 (MHL 2), USB On-the-go, USB Host |
| GPS | No | No | Yes, with A-GPS support and GLONASS |
| Browser | HTML | HTML | HTML5 |
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| Internal | 512 MB (100 MB user available), 256 MB RAM | 4 GB ROM, 512 MB RAM | 16/32 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 32 GB | microSD, up to 64 GB |
| USB OTG | - | - | Supported |
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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 | 2600 mAh |
| Stand by | - | Up to 350 h | Up to 370 h (3G) |
| Talk Time | - | Up to 15 h | Up to 17 h (3G) |
