Phone Comparison - Nokia Lumia 1020 vs Nokia Lumia 635 vs Samsung Galaxy Ace 4
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| Manufacturer | Nokia | Nokia | Samsung |
| Announced | July 2013 | April 2014 | June 2014 |
| Status | Available - July 2013 | Available - May 2014 | Available - July 2014 |
| Colors | Black, White, Yellow | Orange, Yellow, White, Black | Iris Charcoal, Classic White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
130.4 x 71.4 x 10.4 mm (5.13 x 2.81 x 0.41 in) |
129.5 x 66.7 x 9.2 mm (5.1 x 2.63 x 0.36 in) |
121.4 x 62.9 x 10.8 mm (4.78 x 2.48 x 0.43 in) |
| Weight | 158 g (5.57 oz) | 134 g (4.73 oz) | 123.8 g (4.34.0.28 oz) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 |
| 4G Network | LTE 800 / 900 / 1800 / 2100 / 2600 | LTE | - |
| 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 | Microsoft Windows Phone 8.1 | Android OS, v4.4.2 (KitKat) |
| Processor | Dual-core 1.5 GHz Krait, Qualcomm MSM8960 Snapdragon | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Dual-core 1.0 GHz |
| GPU | Adreno 225 | Adreno 305 | - |
| RAM | 2 GB | 512 MB | 512 MB |
| Internal Memory | 32 GB | 8 GB | 4 GB |
| External Memory | No | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | AMOLED capacitive touchscreen, PureMotion HD+ ClearBlack Display, Gorilla Glass 3 | IPS LCD capacitive touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 4.5 inches | 4.0 inches |
| Resolution | 768 x 1280 pixels (332 ppi) | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 61.80% | 64.43% | 59.76% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | Stereo FM radio with RDS | No | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 41 MP (38 MP effective, 7152 x 5368 pixels) | 5 MP, 2592 х 1944 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | Xenon Flash | No | LED flash |
| Features | Carl Zeiss optics, Auto Focus, 1/1.2' Sensor Size, ND Filter, Optical Zoom, Geo-tagging, Face Detection, Optical Zoom, Panorama | Geo-tagging | Auto focus, Geo-tagging, Face And Smile Detection, Panorama |
| Video | Yes, 1080p@30fps | Yes, 720p@30fps | Yes, 720p@30fps |
| Front Camera | Yes, 1.2 MP, 720p [Similar] | No [Similar] | Yes, VGA [Similar] |
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| GPRS | Up to 107 kbps | Yes | Yes |
| Edge | Up to 236.8 kbps | Yes | Yes |
| 3G | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v3.0 with A2DP | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, UPnP technology | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, Wi-Fi hotspot |
| USB | Yes, microUSB v2.0, USB On-the-go | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 32 GB, 2 GB RAM | 8 GB, 512 MB RAM | 4 GB, 512 MB RAM |
| Expandable Storage | No | microSD, up to 64 GB | microSD, up to 64 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 | Non-removable Li-Ion Battery, Wireless Charging Supported via Cover | Li-Ion Battery | Li-Ion Battery |
| Capacity | 2000 mAh | 1830 mAh | 1500 mAh |
| Stand by | Up to 384 h | Up to 648 h | - |
| Talk Time | Up to 19 h 6 min (2G) Up to 13 h 18 min (3G) |
Up to 12 h (2G) Up to 14 h (3G) |
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