Phone Comparison - Nokia Lumia 620 vs Microsoft Lumia 640 LTE vs Xiaomi Redmi 2 Prime
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| Manufacturer | Nokia | Microsoft | Xiaomi |
| Announced | December 2012 | March 2015 | August 2015 |
| Status | Available - January 2013 | Available - April 2015 | Available - August 2015 |
| Price | - | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 6,999 ($102.93) [Similarly Priced] |
| Colors | Lime green, orange, magenta, yellow, cyan, white, black | Yes | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
115.4 x 61.1 x 11 mm (4.54 x 2.41 x 0.43 in) |
141.3 x 72.2 x 8.8 mm (5.56 x 2.84 x 0.35 in) |
134 x 67.2 x 9.4 mm (5.28 x 2.65 x 0.37 in) |
| Weight | 127 g (4.48 oz) | 145 g (5.11 oz) | 133 g (4.69 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 2100 | HSDPA 900 / 2100 |
| 4G Network | - | LTE | LTE |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Microsoft Windows Phone 8 | Microsoft Windows Phone 8.1 with Lumia Denim | Android OS, v4.4.4 (KitKat) |
| Processor | Dual-core 1 GHz Krait, Qualcomm Snapdragon S4 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.2 GHz Cortex-A53, Qualcomm MSM8916 Snapdragon 410 |
| GPU | Adreno 305 | Adreno 305 | Adreno 306 |
| RAM | 512 MB | 1 GB | 2 GB |
| Internal Memory | 8 GB storage | 8 GB | 16 GB (13.78 GB for Apps and Phone Storage) |
| External Memory | microSD, up to 64 GB | microSD, up to 128 GB | microSD, up to 32 GB |
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| Type | TFT capacitive touchscreen | IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3, ClearBlack Display | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.8 inches | 5.0 inches | 4.7 inches |
| Resolution | 480 x 800 pixels (246 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (312 ppi) |
| Screen-to-Body Ratio | 58.06% | 67.43% | 67.83% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | No | FM radio | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1936 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 | Auto focus, 1/4'' Sensor Size | Auto focus, 1.4 µm Pixel Size, BSI Sensor, Geo-tagging, Touch Focus, Face/smile Detection, HDR |
| Video | Yes, 720p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | Yes, VGA [Similar] | 1 MP, 720p [Similar] | 2 MP, 720p [Similar] |
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| GPRS | Class B | Yes | Yes |
| Edge | Class B | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA, LTE Cat4 150/50 Mbps |
| Bluetooth | Yes, v3.0 with A2DP, EDR | v4.0, A2DP | v4.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, dual-band | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| USB | Yes, microUSB v2.0 | microUSB v2.0 | microUSB v2.0, USB Host |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS, Beidou | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB storage, 512 MB RAM | 8 GB, 1 GB RAM | 16 GB (13.78 GB for Apps and Phone Storage), 2 GB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 128 GB | microSD, up to 32 GB |
| USB OTG | - | - | 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 | Standard battery, Li-Ion | Li-Ion Battery | Li-Po Battery |
| Capacity | 1300 mAh (BL-4J) | 2500 mAh | 2200 mAh |
| Stand by | Up to 330 h | Up to 864 h (2G) Up to 864 h (3G) |
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| Talk Time | Up to 14 h 40 min (2G) Up to 9 h 50 min (3G) |
Up to 26 h 30 min (2G) Up to 17 h 30 min (3G) |
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