Phone Comparison - Nokia Lumia 520 vs LG Nexus 5 vs Karbonn Smart A51
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| Manufacturer | Nokia | LG | Karbonn |
| Announced | February 2013 | October 2013 | September 2013 |
| Status | Available - April 2013 | Available - November 2013 | Available - September 2013 |
| Colors | Yellow, red, cyan, white/black | Black, White | White Silver |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
119.9 x 64 x 9.9 mm (4.72 x 2.52 x 0.39 in) |
137.84 x 69.17 x 8.59 mm (5.43 x 2.72 x 0.34 in) |
- |
| Weight | 124 g (4.37 oz) | 130 g (4.59 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 CDMA 800 / 1900 - CDMA version |
GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 HSDPA 850 / 1900 / 2100 |
HSDPA 850 / 900 / 1700 / 1900 / 2100 HSDPA 800 / 850 / 1700 / 1900 / 2100 / 900 - CDMA version |
No |
| 4G Network | - | LTE 800 / 850 / 900 / 1800 / 2100 / 2600 LTE 700 / 800 / 850 / 1700 / 1900 / 2100 / 2600 - CDMA version |
- |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Microsoft Windows Phone 8 | Android OS, v4.4 (KitKat) | Android OS, v4.0 (Ice Cream Sandwich) |
| Processor | Dual-core 1 GHz, Qualcomm MSM8227 Snapdragon S4 | Quad-core 2.3 GHz Krait 400, Qualcomm MSM8974 Snapdragon 800 | 1 GHz |
| GPU | Adreno 305 | Adreno 330 | - |
| RAM | 512 MB | 2 GB | 256 MB |
| Internal Memory | 8 GB storage | 16/32 GB storage | 512 MB (100 MB user available) |
| External Memory | microSD, up to 64 GB | No | microSD, up to 32 GB |
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| Type | IPS LCD capacitive touchscreen | True HD IPS Plus capacitive touchscreen, Corning Gorilla Glass 3 | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 4.95 inches | 3.5 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 1080 x 1920 pixels (445 ppi) | 320 x 480 pixels (165 ppi) |
| Screen-to-Body Ratio | 59.47% | 70.86% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | No | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1944 pixels | 8 MP, 3264 x 2448 pixels | 3.15 MP, 2048x1536 pixels |
| Flash | No | LED flash | LED flash |
| Features | Auto focus, Geo-tagging | Auto focus, Geo-tagging, Touch Focus, Face Detection, Photo Sphere, Optical Image Stabilization | - |
| Video | Yes, 720p@30fps | Yes, 1080p@30fps | Yes |
| Front Camera | No [Similar] | Yes, 1.3 MP [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps | Yes |
| Edge | Yes | Class 12 | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL | No |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP | Yes |
| Wi-Fi | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi hotspot | Wi-Fi 802.11 b/g, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB (SlimPort) v2.0 | Yes |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS | No |
| Browser | HTML5 | HTML5 | HTML |
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| Internal | 8 GB storage, 512 MB RAM | 16/32 GB storage, 2 GB RAM | 512 MB (100 MB user available), 256 MB RAM |
| Expandable Storage | microSD, up to 64 GB | No | microSD, up to 32 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 | Non-removable Li-Po Battery | Li-Ion Battery |
| Capacity | 1430 mAh | 2300 mAh | 1100 mAh |
| Stand by | Up to 384 h (3G) Up to 360 h (3G) |
Up to 300 h | - |
| Talk Time | Up to 17 h 24 min (2G) Up to 9 h 42 min (3G) |
Up to 17 h | - |
