Phone Comparison - Samsung Galaxy Y Duos vs Nokia Lumia 1520 vs Karbonn A12+
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| Manufacturer | Samsung | Nokia | Karbonn |
| Announced | December 2011 | October 2013 | October 2013 |
| Status | Available - February 2012 | Available - November 2013 | Available - October 2013 |
| Colors | Black | Yellow, white, black, red | White, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
109.8 x 60 x 12 mm (4.32 x 2.36 x 0.47 in) |
162.8 x 85.4 x 8.7 mm (6.41 x 3.36 x 0.34 in) |
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| Weight | 109 g (3.84 oz) | 209 g (7.37 oz) | - |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 2100 |
| 4G Network | - | LTE 800 / 900 / 1800 / 2100 / 2600 | - |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v2.3 (Gingerbread) | Microsoft Windows Phone 8 Amber | Android OS, v4.2.2 (Jelly Bean) |
| Processor | Quad-core 2.2 GHz Krait 400, Qualcomm Snapdragon 800 | Dual-core 1.3 GHz, MTK 6572 | |
| GPU | Adreno 330 | Mali-400MP | |
| RAM | 384 MB | 2 GB | 512 MB |
| Internal Memory | 512 MB ROM | 32 GB | 4 GB (1.27 GB for apps, 1.24 GB user available) |
| External Memory | microSD, up to 32GB, 2 GB included | microSD, up to 64 GB | microSD, up to 32 GB |
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| Type | TFT capacitive touchscreen | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen, Wide Viewing Angle |
| Colors | 256K colors | 16M colors | 16M colors |
| Size | 3.14 inches | 6.0 inches | 4.0 inches |
| Resolution | 240 x 320 pixels (127 ppi) | 1080 x 1920 pixels (367 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 46.63% | 71.44% | - |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | FM radio | FM radio |
| Games | Yes | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.15 MP, 2048x1536 pixels | 20 MP, Carl Zeiss optics | 5 MP, 2592х1944 pixels |
| Flash | No | Dual-LED flash | LED flash |
| Features | Geo-tagging | 1/2.5' Sensor Size, PureView Technology, Geo-tagging, Face Detection, Panorama | Auto-focus, Geo-tagging, Face Detection, Panorama |
| Video | Yes, QVGA@24fps | Yes, 1080p@30fps, video light, stereo sound rec. | Yes, 720p |
| Front Camera | No [Similar] | Yes, 1.2 MP, 720p [Similar] | Yes, 2 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 7.2 Mbps | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP | Yes, v2.0 A2DP, EDR |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support |
| Browser | HTML, Adobe Flash | HTML5 | HTML |
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| Internal | 512 MB ROM, 384 MB RAM | 32 GB, 2 GB RAM | 4 GB (1.27 GB for apps, 1.24 GB user available), 512 MB RAM |
| Expandable Storage | microSD, up to 32GB, 2 GB included | microSD, up to 64 GB | 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 | Standard battery, Li-Ion | Non-removable Li-Ion Battery (BV-4BW) | Li-Ion Battery |
| Capacity | 1300 mAh | 3400 mAh | 1400 mAh |
| Stand by | Up to 768 h (2G) Up to 768 h (3G) |
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| Talk Time | Up to 27 h 40 min (2G) Up to 25 h (3G) |
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