Phone Comparison - Xiaomi Mi 4 vs Xiaomi Mi 4 LTE vs Microsoft Lumia 640 XL LTE Dual SIM
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| Manufacturer | Xiaomi | Xiaomi | Microsoft |
| Announced | July 2014 | December 2014 | March 2015 |
| Status | Available - Q3 2014 | Available - December 2014 | Available - April 2015 |
| Price | - | Rs. 11,999 ($176.46) [Similarly Priced] | Rs. 14,999 ($220.57) [Similarly Priced] |
| Colors | Black, White | White | Matte cyan, Orange, Black, Matte white, Glossy white |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
139.2 x 68.5 x 8.9 mm (5.48 x 2.7 x 0.35 in) |
139.2 x 68.5 x 8.9 mm (5.48 x 2.7 x 0.35 in) |
157.9 x 81.5 x 9 mm (6.22 x 3.21 x 0.35 in) |
| Weight | 149 g (5.26 oz) | 149 g (5.26 oz) | 171 g (6.03 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE | LTE - international model | LTE |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Android OS, v4.4.3 (KitKat) | Android OS, v4.4.3 (KitKat) | Microsoft Windows Phone 8.1 with Lumia Denim |
| Processor | Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801 | Quad-core 2.5 GHz Krait 400, Qualcomm MSM8974AC Snapdragon 801 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 |
| GPU | Adreno 330 | Adreno 330 | Adreno 305 |
| RAM | 3 GB | 3 GB | 1 GB |
| Internal Memory | 16/64 GB | 16 GB | 8 GB |
| External Memory | No | No | 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 | 5.0 inches | 5.0 inches | 5.7 inches |
| Resolution | 1080 x 1920 pixels (441 ppi) | 1080 x 1920 pixels (441 ppi) | 720 x 1280 pixels (259 ppi) |
| Screen-to-Body Ratio | 72.14% | 72.14% | 68.88% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels | 13 MP, 4128 x 3096 pixels |
| Flash | Dual-LED Flash | dual-LED flash | LED Flash |
| Features | Auto focus, 1/3' Sensor Size, 1.12µm Pixel Size, Geo-tagging, Touch Focus, Face And Smile Detection, HDR | Auto focus, 1/3' Sensor Size, 1.12�m Pixel Size, Geo-tagging, Touch Focus, Face/smile Detection, Panorama, HDR | Carl Zeiss Optics, 1/3'' sensor size |
| Video | 2160p, 1080p@30fps, HDR | 2160p@30fps, 1080p@30fps, 720p@120fps, HDR | 1080p@30fps |
| Front Camera | 8 MP, 1080p@30fps [Similar] | 8 MP, 1080p@30fps [Similar] | 5 MP, 1080p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | DC-HSDPA, 42 Mbps; HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP | v4.0, A2DP | v4.0, A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot | Wi-Fi 802.11 b/g/n, DLNA, hotspot |
| USB | microUSB v2.0 (MHL), USB On-the-go | microUSB v2.0, USB Host | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS support, GLONASS, Beidou | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 16/64 GB, 3 GB RAM | 16 GB, 3 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | No | No | 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 | Non-removable Li-Ion Battery | Non-removable Li-Ion Battery | Li-Ion Battery |
| Capacity | 3080 mAh | 3080 mAh | 3000 mAh |
| Stand by | - | - | Up to 936 h (2G) Up to 936 h (3G) |
| Talk Time | - | - | Up to 31 h 20 min (2G) Up to 23 h 40 min (3G) |
