Phone Comparison - Xiaomi Redmi Note 4G vs Sony Xperia M2 Aqua vs Microsoft Lumia 640 LTE
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| Manufacturer | Xiaomi | Sony | Microsoft |
| Announced | August 2014 | August 2014 | March 2015 |
| Status | Available - November 2014 | Available - September 2014 | Available - April 2015 |
| Price | - | - | Rs. 7,999 ($117.63) [Similarly Priced] |
| Colors | Black/White | Black, White, Golden | Yes |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
154 x 78.7 x 9.5 mm (6.06 x 3.1 x 0.37 in) |
140 x 72 x 8.6 mm (5.51 x 2.83 x 0.34 in) |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
| Weight | 199 g (7.02 oz) | 149 g (5.26 oz) | 145 g (5.11 oz) |
| 2G Network | GSM 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - all models | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | TD-SCDMA 1900 / 2000 | HSDPA 850 / 900 / 2100 - D2403 HSDPA 850 / 1700 / 1900 / 2100 - D2406 |
HSDPA 850 / 900 / 2100 |
| 4G Network | TD-LTE 1900 / 2300 / 2600 | LTE 800 / 850 / 900 / 1800 / 2100 / 2600 - D2403 | LTE |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
| Build Features | - | - IP65/IP68 certified - dust and water proof up to 1.5 meter and 30 minutes | - |
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| OS | Android OS, v4.2 (Jelly Bean) | Android OS, v4.4.2 (KitKat) | Microsoft Windows Phone 8.1 with Lumia Denim |
| Processor | Quad-core 1.6 GHz Cortex-A7, Qualcomm MSM8928 Snapdragon 400 | Quad-core 1.2 GHz Cortex-A7, Qualcomm MSM8926-2 Snapdragon 400 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 |
| GPU | Adreno 305 | Adreno 305 | Adreno 305 |
| RAM | 2 GB | 1 GB | 1 GB |
| Internal Memory | 8 GB | 8 GB | 8 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 128 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 4.8 inches | 5.0 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 540 x 960 pixels (229 ppi) | 720 x 1280 pixels (294 ppi) |
| Screen-to-Body Ratio | 68.82% | 63.27% | 67.43% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio with RDS | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4128 x 3096 pixels | 8 MP, 3264 x 2448 pixels | 8 MP, 3264 x 2448 pixels |
| Flash | LED flash | LED flash | LED flash |
| Features | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, HDR | Auto focus, Geo-tagging, Touch Focus, Face And Smile Detection, HDR, Panorama | Auto focus, 1/4'' Sensor Size |
| Video | 1080p@30fps | 1080p@30fps, HDR | 1080p@30fps |
| Front Camera | 5 MP [Similar] | VGA, 480p [Similar] | 1 MP, 720p [Similar] |
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| GPRS | Yes | Up to 107 kbps | Yes |
| Edge | Yes | Up to 296 kbps | Yes |
| 3G | TD-SCDMA; LTE | HSDPA, 42 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP, LE | v4.0, A2DP, apt-X, LE | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| USB | microUSB v2.0, USB On-the-go | microUSB v2.0, USB On-the-go, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 2 GB RAM | 8 GB, 1 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 32 GB | microSD, up to 128 GB |
| 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-Po Battery | Non-removable Li-Ion Battery | Li-Ion Battery |
| Capacity | 3200 mAh | 2300 mAh | 2500 mAh |
| Stand by | Up to 775 h (3G) | Up to 595 h (2G) Up to 641 h (3G) |
Up to 864 h (2G) Up to 864 h (3G) |
| Talk Time | Up to 38 h (2G) Up to 14 h (3G) |
Up to 11 h 23 min (2G) Up to 12 h 11 min (3G) |
Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
