Phone Comparison - Oppo A57 vs Xiaomi Redmi Note 5A Prime vs Vivo X20 Plus
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| Manufacturer | Oppo | Xiaomi | vivo |
| Announced | November 2016 | October 2017 | September 2017 |
| Status | Available - January 2017 | Available - October 2017 | Coming Soon - September 2017 |
| Price | Rs. 14,990 ($240.00) [Similarly Priced] | Rs. 10,500 ($160.00) [Similarly Priced] | Rs. 34,500 ($530.00) [Similarly Priced] |
| Colors | Gold, Rose Gold | Gold, Silver, Gray | Black, Pink, Gold |
| 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 x 76.2 x 7.7 mm (6.02 x 3 x 0.3 in) |
165.32 x 80.09 x 7.45 mm (6.51 x 3.15 x 0.29 in) |
| Weight | 147 g (5.19 oz) | 153 g (5.4 oz) | 181.5 g (6.38.0.18 oz) |
| SIM Type | Dual-SIM | Dual SIM | 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 900 / 1800 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE band 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) | LTE | LTE |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail |
| Build Features | - Fingerprint Sensor - Metal Build - 2.5D Curved Glass | - Fingerprint Sensor | - Fingerprint Sensor - ES9318 DAC |
| Notification LED | Yes | Yes | Yes |
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| OS | Android OS, v6.0 (Marshmallow) | Android OS, v7.1.1 (Nougat) | Android 7.1.1 (Nougat) |
| User Interface | ColorOS 3.0 | MIUI 9 | FunTouch OS |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 | 1.4 GHz Quad-core Cortex-A53, Qualcomm MSM8940 Snapdragon 435 | Octa-core (4x2.2 GHz Kryo + 4x1.8 Ghz Kryo), Qualcomm MSM8956 Plus Snapdragon 660 |
| GPU | Adreno 505 | Adreno 505 | Adreno 512 |
| RAM | 3 GB | 3 GB | 4 GB |
| Internal Memory | 32 GB | 32 GB | 64 GB |
| External Memory | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 128 GB | microSD, up to 256 GB |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen | Super AMOLED Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.2 inches | 5.5 inches | 6.43 inches |
| Resolution | 720 x 1280 pixels (282 ppi) | 720 x 1280 pixels (267 ppi) | 1080 x 2160 pixels (376 ppi) |
| Screen-to-Body Ratio | 68.79% | 71.54% | 80.40% |
| 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 | 13 MP | 13 MP | Dual 12 MP + 5 MP |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Autofocus, f/2.2 aperture, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Autofocus, Geo-tagging, f/1.8 aperture, OIS, Touch Focus, Face Detection, HDR, Backlight, Motion Picture, Beauty, Panoramic |
| Video | 1080p@30fps | 1080p@30fps, 720p@120fps | 1080p@30fps |
| Front Camera | 16 MP [Similar] | 16 MP, LED Flash [Similar] | 12 MP, f/2.0 [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE, VoLTE | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps, VoLTE | HSPA, LTE, VoLTE |
| Bluetooth | v4.1, A2DP | v4.2, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot |
| USB | microUSB v2.0, USB Host | microUSB v2.0 | microUSB 2.0 |
| GPS | Yes, with A-GPS | Yes, with A-GPS | Yes, with A-GPS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 32 GB, 3 GB RAM | 32 GB, 3 GB RAM | 64 GB, 4 GB RAM |
| Expandable Storage | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 128 GB | microSD, up to 256 GB |
| USB OTG | Supported | 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 | 3080 mAh | 3905 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
