Phone Comparison - Celkon Campus A15 vs Nokia Lumia 635 vs Samsung Galaxy S5 Neo
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| Manufacturer | Celkon | Nokia | Samsung |
| Announced | October 2013 | April 2014 | August 2015 |
| Status | Available - October 2013 | Available - May 2014 | Available - August 2015 |
| Colors | White | Orange, Yellow, White, Black | Black, White |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension | - |
129.5 x 66.7 x 9.2 mm (5.1 x 2.63 x 0.36 in) |
142 x 72.5 x 8.1 mm (5.59 x 2.85 x 0.32 in) |
| Weight | - | 134 g (4.73 oz) | 145 g (5.11 oz) |
| 2G Network | GSM 900 / 1800 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - all versions |
| 3G Network | No | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 1900 / 2100 |
| 4G Network | - | LTE | LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600 |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM |
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| OS | Android OS, v4.2.2 (Jelly Bean) | Microsoft Windows Phone 8.1 | Android OS, v5.1.1 (Lollipop) |
| Processor | Dual-core 1 GHz | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Octa-core 1.6 GHz Cortex-A53, Exynos 7580 Octa |
| GPU | - | Adreno 305 | Mali-T720MP2 |
| RAM | 256 MB | 512 MB | 2 GB |
| Internal Memory | 512 MB (App Memory - 165 MB, User Memory - 12.15 MB) | 8 GB | 16 GB |
| External Memory | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 128 GB |
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| Type | TFT touchscreen | IPS LCD capacitive touchscreen | Super AMOLED capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 3.5 inches | 4.5 inches | 5.1 inches |
| Resolution | 320 x 480 pixels (165 ppi) | 480 x 854 pixels (218 ppi) | 1080 x 1920 pixels (432 ppi) |
| Screen-to-Body Ratio | - | 64.43% | 69.63% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | No | No |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 3.2 MP, 2048x1536 pixels | 5 MP, 2592 х 1944 pixels | 16 MP, f/1.9 |
| Flash | No | No | LED flash |
| Features | Fixed Focus | Geo-tagging | Geo-tagging, Touch Focus, Face And Smile Detection, Panorama, HDR |
| Video | Yes | Yes, 720p@30fps | 1080p@30fps |
| Front Camera | No [Similar] | No [Similar] | 2 MP, 1080p@30fps [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Class 12 | Yes | Yes |
| 3G | No | HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL | HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL |
| Bluetooth | Yes, with A2DP | Yes, v4.0 with A2DP | v4.0, A2DP, EDR, LE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi hotspot | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot |
| USB | Yes | Yes, microUSB v2.0 | microUSB v2.0 |
| GPS | - | Yes, with A-GPS support and GLONASS | Yes, with A-GPS, GLONASS, Beidou |
| Browser | HTML | HTML5 | HTML5 |
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| Internal | 512 MB (App Memory - 165 MB, User Memory - 12.15 MB), 256 MB RAM | 8 GB, 512 MB RAM | 16GB, 2 GB RAM |
| Expandable Storage | microSD, up to 32 GB | microSD, up to 64 GB | microSD, up to 128 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 | 2800 mAh |
| Capacity | 1400 mAh | 1830 mAh | - |
| Stand by | - | Up to 648 h | - |
| Talk Time | - | Up to 12 h (2G) Up to 14 h (3G) |
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