Phone Comparison - OPPO Neo R831K vs Samsung Galaxy J1 vs Microsoft Lumia 540 Dual SIM
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| Manufacturer | Oppo | Samsung | Microsoft |
| Announced | August 2014 | January 2015 | April 2015 |
| Status | Available - August 2014 | Available - January 2015 | Available - May 2015 |
| Price | - | Rs. 5,850 ($86.03) [Similarly Priced] | Rs. 8,100 ($119.12) [Similarly Priced] |
| Colors | White, Black | Blue, Black, White | Orange, white, black, cyan |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
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) |
144 x 73.7 x 9.4 mm (5.67 x 2.9 x 0.37 in) |
| Weight | 130 g (4.59 oz) | 122 g (4.3 oz) | 152 g (5.36 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 2100 | HSDPA 900 / 2100 (single or dual SIM) HSDPA 850 / 2100 (dual SIM) |
HSDPA 900 / 2100 |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.2.2 (Jelly Bean) based Color OS | Android OS, v4.4.x (KitKat) | Microsoft Windows Phone 8.1 with Lumia Denim |
| Processor | Dual-core 1.3 GHz | Dual-core 1.2 GHz Cortex-A7 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 200 |
| GPU | - | - | Adreno 302 |
| RAM | 1 GB | 512 MB | 1 GB |
| Internal Memory | 4 GB | 4 GB | 8 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 128 GB | microSD, up to 128 GB |
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| Type | IPS LCD capacitive touchscreen | TFT Capacitive Touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 4.3 inches | 5.0 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (217 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 64.07% | 59.80% | 64.82% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | - | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 5 MP, 2592 х 1944 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED Flash | LED Flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face Detection | Auto focus, Sensor size: 1/4 inch, f/2.2 aperture |
| Video | Yes | 720p@30fps | 480p@30fps |
| Front Camera | Yes, 2 MP [Similar] | 2 MP [Similar] | 5 MP [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Up to 236 kbps |
| 3G | HSPA+ | HSPA | HSPA 42.2/5.76 Mbps |
| Bluetooth | v2.1, A2DP | v4.0, A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS |
| Browser | HTML | HTML | HTML5 |
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| Internal | 4 GB, 1 GB RAM | 4 GB, 512 MB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 128 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 | 1900 mAh | 1850 mAh | 2200 mAh |
| Stand by | - | - | Up to 576 h |
| Talk Time | - | Up to 10 h (3G) | Up to 26.2 h (2G) Up to 14.8 h (3G) |
