Phone Comparison - Oppo A57 vs Oppo A77 vs Samsung Galaxy J7 (2017)
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| Manufacturer | Oppo | Oppo | Samsung |
| Announced | November 2016 | July 2017 | June 2017 |
| Status | Available - January 2017 | Available - July 2017 | Available - July 2017 |
| Price | Rs. 14,990 ($240.00) [Similarly Priced] | - | Rs. 24,500 ($330.00) [Similarly Priced] |
| Colors | Gold, Rose Gold | Gold, Rose Gold | Gold, Black, Pink, Blue |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
149.1 x 72.9 x 7.65 mm (5.87 x 2.87 x 0.3 in) |
153.3 x 75.9 x 7.4 mm (6.04 x 2.99 x 0.29 in) |
152.4 x 74.7 x 7.9 mm (6 x 2.94 x 0.31 in) |
| Weight | 147 g (5.19 oz) | 148 g (5.22 oz) | - |
| SIM Type | Dual-SIM | Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA2000 1xEV-DO - A59m |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 - J710F, J710H HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - J710M |
| 4G Network | LTE band 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) | LTE | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800), 40(2300) - J710F |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail | SMS, MMS, EMail, IM |
| Build Features | - Fingerprint Sensor - Metal Build - 2.5D Curved Glass | - Fingerprint Sensor |
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| Notification LED | Yes | Yes | - |
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| OS | Android OS, v6.0 (Marshmallow) | Android OS, v7.0 (Nougat) | Android OS, v7.1 (Nougat) |
| User Interface | ColorOS 3.0 | - | - |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 | Octa-core 2.0 GHz Cortex-A53, Qualcomm MSM8953 Snapdragon 625 | Octa-core 1.6 GHz Cortex-A53, Exynos 7870 |
| GPU | Adreno 505 | Adreno 506 | Mali-T830 MP2 |
| RAM | 3 GB | 4 GB | 3 GB |
| Internal Memory | 32 GB | 64 GB | 16 GB |
| External Memory | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen | Super AMOLED capacitive touchscreen, 2.5D Gorilla Glass |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.2 inches | 5.5 inches | 5.5 inches |
| Resolution | 720 x 1280 pixels (282 ppi) | 1080 x 1920 pixels (401 ppi) | 1080 x 1920 pixels (401 ppi) |
| Screen-to-Body Ratio | 68.79% | 71.50% | 73.08% |
| Multi-Touch |  |
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| 3.5mm Jack | |
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| Radio | FM radio | FM Radio | FM radio, RDS, recording |
| Games | Yes + Downloadable | Yes + Downloadable | Yes + Downloadable |
| Loud Speaker | |
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| Rear Camera | 13 MP | 13 MP | 13 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Autofocus, f/1.7, 28mm, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 16 MP [Similar] | 16 MP, f/2.0 [Similar] | 13 MP, f/1.9 [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE, VoLTE | HSPA, LTE, VoLTE | HSPA, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.1, A2DP | 4.2, A2DP | v4.1, A2DP |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, hotspot | Wi-Fi 802.11 b/g/n, hotspot | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot |
| USB | microUSB v2.0, USB Host | microUSB 2.0 | microUSB v2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 32 GB, 3 GB RAM | 64 GB, 4 GB RAM | 16 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB |
| USB OTG | Supported | Not Supported | Supported |
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| Fingerprint | |
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| Proximity Sensor | |
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| Accelerometer Sensor | |
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| Light Sensor | |
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| Magnetic-Field Sensor (Compass) | |
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| NFC | |
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| Type | Non-removable Li-Ion Battery | Non-removable Li-Ion Battery | Non-removable Li-Ion Battery |
| Capacity | 2900 mAh | 3200 mAh | 3600 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
