Phone Comparison - Microsoft Lumia 640 LTE vs Microsoft Lumia 950 vs Microsoft Lumia 550
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| Manufacturer | Microsoft | Microsoft | Microsoft |
| Announced | March 2015 | October 2015 | October 2015 |
| Status | Available - April 2015 | Available - November 2015 | Available - December 2015 |
| Price | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 27,300 ($399.00) [Similarly Priced] | Rs. 7,999 ($117.63) [Similarly Priced] |
| Colors | Yes | Black, White | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
145 x 73.2 x 8.2 mm (5.71 x 2.88 x 0.32 in) |
136.1 x 67.8 x 9.9 mm (5.36 x 2.67 x 0.39 in) |
| Weight | 145 g (5.11 oz) | 150 g (5.29 oz) | 141.9 (4.97.0.32) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 20(800), 28(700), 38(2600), 40(2300) | LTE band 1(2100), 3(1800), 7(2600), 8(900), 20(800) |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM |
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| OS | Microsoft Windows Phone 8.1 with Lumia Denim | Microsoft Windows 10 | Microsoft Windows 10 |
| Processor | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Dual-core 1.82 GHz Cortex-A57 & quad-core 1.44 GHz Cortex-A53, Qualcomm MSM8992 Snapdragon 808 | Quad-core 1.1 GHz Cortex-A7, Qualcomm MSM8909 Snapdragon 210 |
| GPU | Adreno 305 | Adreno 418 | Adreno 304 |
| RAM | 1 GB | 3 GB | 1 GB |
| Internal Memory | 8 GB | 32 GB | 8 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 200 GB | microSD, up to 200 GB |
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| Type | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display | AMOLED capacitive touchscreen | Capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.0 inches | 5.2 inches | 4.7 inches |
| Resolution | 720 x 1280 pixels (294 ppi) | 1440 x 2560 pixels (564 ppi) | 720 x 1280 pixels (315 ppi) |
| Screen-to-Body Ratio | 67.43% | 70.44% | 64.94% |
| 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 | 8 MP, 3264 x 2448 pixels | 20 MP, 4992 х 3744 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | LED flash | Carl Zeiss optics | LED flash |
| Features | Auto focus, 1/4'' Sensor Size | 1/2.4' Sensor Size, 1.12 μm Pixel Size, PureView Technology, Dual Capture, Geo-tagging, Face Detection, Panorama, HDR | Auto focus, 1/4' Sensor Size, Geo-tagging, Touch Focus |
| Video | 1080p@30fps | 2160p@30fps, optical stabilization, stereo sound rec. | 720p@30fps |
| Front Camera | 1 MP, 720p [Similar] | 5 MP, 1080p [Similar] | 2 MP, 480p [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat6 300/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.0, A2DP | v4.1, A2DP | v4.1, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, hotspot | Wi-Fi 802.11 b/g/n, hotspot |
| USB | microUSB v2.0 | Type-C 1.0 reversible connector | microUSB v2.0 |
| GPS | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 32 GB, 3 GB RAM | 8 GB, 1 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 200 GB | microSD, up to 200 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 | 2500 mAh | 3000 mAh | 2100 mAh |
| Stand by | Up to 864 h (2G) Up to 864 h (3G) |
Up to 288 h (2G) Up to 288 h (3G) |
Up to 672 h (2G) Up to 672 h (3G) |
| Talk Time | Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
Up to 23 h (2G) Up to 18 h (3G) |
Up to 16 h (2G) Up to 14 h (3G) |
