Phone Comparison - Nokia Lumia 520 vs Nokia Lumia 635 vs Samsung Galaxy Ace 4
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| Manufacturer | Nokia | Nokia | Samsung |
| Announced | February 2013 | April 2014 | June 2014 |
| Status | Available - April 2013 | Available - May 2014 | Available - July 2014 |
| Colors | Yellow, red, cyan, white/black | Orange, Yellow, White, Black | Iris Charcoal, Classic White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
119.9 x 64 x 9.9 mm (4.72 x 2.52 x 0.39 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 | 124 g (4.37 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 900 / 2100 HSDPA 850 / 1900 / 2100 |
HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 |
| 4G Network | - | 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 GHz, Qualcomm MSM8227 Snapdragon S4 | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Dual-core 1.0 GHz |
| GPU | Adreno 305 | Adreno 305 | - |
| RAM | 512 MB | 512 MB | 512 MB |
| Internal Memory | 8 GB storage | 8 GB | 4 GB |
| External Memory | microSD, up to 64 GB | microSD, up to 64 GB | microSD, up to 64 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD capacitive touchscreen | TFT capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.0 inches | 4.5 inches | 4.0 inches |
| Resolution | 480 x 800 pixels (233 ppi) | 480 x 854 pixels (218 ppi) | 480 x 800 pixels (233 ppi) |
| Screen-to-Body Ratio | 59.47% | 64.43% | 59.76% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM Radio | No | FM radio |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 5 MP, 2592х1944 pixels | 5 MP, 2592 х 1944 pixels | 5 MP, 2592 х 1944 pixels |
| Flash | No | No | LED flash |
| Features | Auto focus, Geo-tagging | Geo-tagging | Auto focus, Geo-tagging, Face And Smile Detection, Panorama |
| Video | Yes, 720p@30fps | Yes, 720p@30fps | Yes, 720p@30fps |
| Front Camera | No [Similar] | No [Similar] | Yes, VGA [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps |
| Bluetooth | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP | Yes, v4.0 with A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n | 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 | Yes, microUSB v2.0 | Yes, microUSB v2.0 |
| GPS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS | Yes, with A-GPS support and GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB storage, 512 MB RAM | 8 GB, 512 MB RAM | 4 GB, 512 MB RAM |
| Expandable Storage | microSD, up to 64 GB | microSD, up to 64 GB | microSD, up to 64 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 | 1430 mAh | 1830 mAh | 1500 mAh |
| Stand by | Up to 384 h (3G) Up to 360 h (3G) |
Up to 648 h | - |
| Talk Time | Up to 17 h 24 min (2G) Up to 9 h 42 min (3G) |
Up to 12 h (2G) Up to 14 h (3G) |
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