Phone Comparison - Samsung Galaxy Core 2 Duos vs OPPO Neo R831K vs Samsung Galaxy J1 4G
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| Manufacturer | Samsung | Oppo | Samsung |
| Announced | June 2014 | August 2014 | January 2015 |
| Status | Available - July 2014 | Available - August 2014 | Available - March 2015 |
| Price | - | - | Rs. 6,890 ($85.99) [Similarly Priced] |
| Colors | White, Black | White, Black | White, Black, Blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
130.3 x 68 x 9.8 mm (5.13 x 2.68 x 0.39 in) |
132 x 65.8 x 9.2 mm (5.2 x 2.59 x 0.36 in) |
129 x 68.2 x 8.9 mm (5.08 x 2.69 x 0.35 in) |
| Weight | 138 g (4.87 oz) | 130 g (4.59 oz) | 122 g (4.3 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (optional) |
| 3G Network | HSDPA 900 / 2100 | HSDPA 2100 | HSDPA 900 / 2100 |
| 4G Network | - | - | LTE 1800 TD-LTE 2300 (Bands 3, 40) |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.4.2 (KitKat) | Android OS, v4.2.2 (Jelly Bean) based Color OS | Android OS, v4.4.4 (KitKat) |
| Processor | Quad-core 1.2 GHz | Dual-core 1.3 GHz | Quad-core 1.2 GHz |
| GPU | - | - | - |
| RAM | 768 MB | 1 GB | 768 MB |
| Internal Memory | 4 GB | 4 GB | 4 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 128 GB |
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| Type | TFT capacitive touchscreen | IPS LCD capacitive touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 4.5 inches | 4.3 inches |
| Resolution | 480 x 800 pixels (207 ppi) | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (217 ppi) |
| Screen-to-Body Ratio | 65.25% | 64.07% | 59.80% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | FM radio | FM radio with RDS; recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 х 1944 pixels | 5 MP, 2592 x 1944 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | LED Flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection |
| Video | Yes | Yes | 720p@30fps |
| Front Camera | Yes, VGA [Similar] | Yes, 2 MP [Similar] | 2 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSPA+ | HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v4.0 with A2DP | v2.1, A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML | HTML |
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| Internal | 4 GB, 768 MB RAM | 4 GB, 1 GB RAM | 4 GB, 768 MB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 128 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 | 2000 mAh | 1900 mAh | 1850 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
