Phone Comparison - Nokia Lumia 638 vs Gionee F103 vs Oppo A57
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| Manufacturer | Nokia | Gionee | Oppo |
| Announced | December 2014 | August 2015 | November 2016 |
| Status | Available - December 2014 | Available - August 2015 | Available - January 2017 |
| Price | Rs. 7,999 ($117.63) [Similarly Priced] | Rs. 11,949 ($175.72) [Similarly Priced] | Rs. 14,990 ($240.00) [Similarly Priced] |
| Colors | Black | Black, White | Gold, Rose Gold |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
129.5 x 66.7 x 9.2 mm (5.1 x 2.63 x 0.36 in) |
146 x 70.3 x 7.95mm (5.75 x 2.77 x 0.31in) |
149.1 x 72.9 x 7.65 mm (5.87 x 2.87 x 0.3 in) |
| Weight | 136 g (4.8 oz) | - | 147 g (5.19 oz) |
| SIM Type | - | - | Dual-SIM |
| 2G Network | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA2000 1xEV-DO - A59m |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE 1800 / 1900 / 2100 / 2300 / 2500 / 2600 (Bands 3, 7, 38, 39, 40, 41) | LTE | LTE band 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) |
| Messaging | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail |
| Build Features | - | - | - Fingerprint Sensor - Metal Build - 2.5D Curved Glass |
| Notification LED | - | - | Yes |
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| OS | Microsoft Windows Phone 8.1 | Android OS, v5.0 (Lollipop) | Android OS, v6.0 (Marshmallow) |
| Processor | Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400 | Quad-core 1.3 GHz, Mediatek MT6735 | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 |
| GPU | Adreno 305 | Mali-T760 | Adreno 505 |
| RAM | 1 GB | 2 GB | 3 GB |
| Internal Memory | 8 GB | 16 GB | 32 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 64 GB | microSD, up to 128 GB (uses SIM 2 slot) |
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| Type | IPS LCD capacitive touchscreen, Corning Gorilla Glass 3, ClearBlack Display | IPS LCD Capacitive Touchscreen, Dragontrail Glass Protection | IPS LCD capacitive touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 4.5 inches | 5.0 inches | 5.2 inches |
| Resolution | 480 x 854 pixels (218 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (282 ppi) |
| Screen-to-Body Ratio | 64.43% | 67.02% | 68.79% |
| 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 | 5 MP, 2592 х 1944 pixels | 8 MP, 3264 x 2448 pixels | 13 MP |
| Flash | No | LED flash | LED Flash |
| Features | Auto focus, 1/4 | Auto focus, Geo-tagging, Touch Focus, Face/smile Detection, Panorama | Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | Yes | Yes, 1080p | 1080p@30fps |
| Front Camera | No [Similar] | 5 MP, f/2.0 Aperture [Similar] | 16 MP [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 | HSPA, LTE, VoLTE |
| Bluetooth | v4.0, A2DP, LE/ apt-X after WP8 Denim update | v4.0, A2DP | v4.1, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, DLNA, hotspot | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 a/b/g/n, hotspot |
| USB | microUSB v2.0 | microUSB v2.0 | microUSB v2.0, USB Host |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS | Yes, with A-GPS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 8 GB, 1 GB RAM | 16 GB, 2 GB RAM | 32 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 64 GB | microSD, up to 128 GB (uses SIM 2 slot) |
| 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 | Li-Ion Battery (BL-5H) | Li-Ion Battery | Non-removable Li-Ion Battery |
| Capacity | 1830 mAh | 2400 mAh | 2900 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
