Phone Comparison - OPPO Neo R831K vs OnePlus 2 vs Xiaomi Mi Note Pro
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| Manufacturer | Oppo | OnePlus | Xiaomi |
| Announced | August 2014 | July 2015 | January 2015 |
| Status | Available - August 2014 | Available - August 2015 | Available - January 2015 |
| Price | - | Rs. 19,999 ($294.10) [Similarly Priced] | Rs. 25,290 ($371.00) [Similarly Priced] |
| Colors | White, Black | Sandstone Black | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
132 x 65.8 x 9.2 mm (5.2 x 2.59 x 0.36 in) |
151.8 x 74.9 x 9.85 mm (5.98 x 2.95 x 0.39 in) |
155.1 x 77.6 x 7 mm (6.11 x 3.06 x 0.28 in) |
| Weight | 130 g (4.59 oz) | 175 g (6.17 oz) | 161 g (5.68 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 2100 | HSDPA 850 / 900 / 1700 / 1900 / 2100 | HSDPA |
| 4G Network | - | LTE 700 / 1700 / 1800 / 2100 / 2300 / 2600 | LTE - SIM 1 & SIM 2 |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
| Build Features | - | Fingerprint sensor,Metal Frame,Replaceable Back-covers | Corning Gorilla Glass 3 Back Panel |
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| OS | Android OS, v4.2.2 (Jelly Bean) based Color OS | Android OS, v5.1.1 (Lollipop), OxygenOS | Android OS, v4.4.x (KitKat) |
| Processor | Dual-core 1.3 GHz | Quad-core 1.5 GHz Cortex-A53 & Quad-core 2 GHz Cortex-A57, Qualcomm MSM8994 Snapdragon 810 | Quad-core 1.5 GHz Cortex-A53 & Quad-core 2 GHz Cortex-A57, Qualcomm MSM8994 Snapdragon 810 |
| GPU | - | Adreno 430 | Adreno 430 |
| RAM | 1 GB | 4/3 GB | 4 GB |
| Internal Memory | 4 GB | 16/64 GB | 64 GB |
| External Memory | microSD, up to 32 GB | No | - |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 4 | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 5.5 inches | 5.7 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 1080 x 1920 pixels (401 ppi) | 1440 x 2560 pixels (515 ppi) |
| Screen-to-Body Ratio | 64.07% | 73.17% | 74.50% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | No | - |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592 x 1944 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | LED Flash | Dual-LED flash | dual-LED (dual tone) |
| Features | Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR | Laser Auto focus, Optical Image Stabilization (OIS), Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, HDR, Panorama |
| Video | Yes | 2160p@30fps, 2160p(DCI)@24fps, 1080p@60fps, 720p@120fps, HDR, stereo sound rec. | 1080p@30fps |
| Front Camera | Yes, 2 MP [Similar] | 5 MP, 1080p@30fps [Similar] | 4 MP, 1080p, 1/3 [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA+ | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA, LTE Cat9 450/50 Mbps |
| Bluetooth | v2.1, A2DP | v4.1, A2DP | v4.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, 2.4/5 GHz, Wi-Fi Direct, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot |
| USB | microUSB v2.0 | microUSB v2.0, USB Host | microUSB v2.0, USB Host |
| GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 4 GB, 1 GB RAM | 16/64 GB, 4/3 GB RAM | 64 GB, 4 GB RAM |
| Expandable Storage | microSD, up to 32 GB | No | - |
| USB OTG | - | Supported | 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 | Non-removable Li-Po Battery | Li-Ion Battery |
| Capacity | 1900 mAh | 3300 mAh | 3000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
