Phone Comparison - Vivo Y66 vs Xiaomi Mi A2 (Mi 6X) vs Oppo A3
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| Manufacturer | vivo | Xiaomi | Oppo |
| Announced | December 2016 | April 2018 | April 2018 |
| Status | Available - December 2016 | Available - April 2018 | Coming Soon - May 2018 |
| Price | Rs. 14,990 ($216.00) [Similarly Priced] | Rs. 16,900 ($250.00) [Similarly Priced] | Rs. 21,000 ($315.00) [Similarly Priced] |
| Colors | Gold | Cherry Pink, Flame Red, Sand Gold, Glacier Blue, Black | Knight Black, Soybean Meal, Stardust Silver, Garnet Red |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
153.56 x 75.79 x 7.49 mm (6.05 x 2.98 x 0.29 in) |
158.7 x 75.4 x 7.3 mm (6.25 x 2.97 x 0.29 in) |
156 x 75.3 x 7.8 mm (6.14 x 2.96 x 0.31 in) |
| Weight | 157 g (5.54 oz) | 168 g (5.93 oz) | 159 g (5.61 oz) |
| SIM Type | Dual SIM Hybrid (Nano SIM + Micro SIM, or Micro SIM + microSD Card) | Hybrid Dual SIM (Nano-SIM, dual stand-by) | Dual SIM (Nano-SIM, dual stand-by) |
| 2G Network | GSM 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA2000 1xEV-DO |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA - China |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA |
| 3G Network | HSDPA 850 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 1700(AWS) / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) |
| Messaging | SMS, MMS, EMail, IM | SMS, MMS, Push Mail, EMail, IM | SMS, MMS, Push Mail, EMail |
| Build Features | - Metal Body - 2.5D Curved Glass |
- Fingerprint Sensor |
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| Notification LED | Yes | Yes | - |
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| OS | Android OS, v6.0.1 (Marshmallow) | Android 8.1 (Oreo); Android One | Android 8.1 (Oreo) |
| User Interface | FunTouch OS 3.0 | - | - |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8937 Snapdragon 430 | Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260), Qualcomm SDM660 Snapdragon 660 | Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53), Mediatek Helio P60 |
| GPU | Adreno 505 | Adreno 512 | Mali-G72 MP3 |
| RAM | 3 GB | 6 GB | 4 GB |
| Internal Memory | 32 GB | 128 GB | 128 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) |
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| Type | IPS LCD capacitive touchscreen | LTPS IPS LCD Capacitive Touchscreen, Corning Gorilla Glass 3 | LTPS IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.99 inches | 6.2 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 1080 x 2160 pixels (403 ppi) | 1080 x 2280 pixels (407 ppi) |
| Screen-to-Body Ratio | 71.66% | 77.44% | 81.64% |
| 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, 4160 x 3120 pixels | Dual 12 MP + 20 MP | 16 MP (f/1.8) |
| Flash | LED Flash | LED Flash | LED Flash |
| Features | AutoFocus, Geo-tagging, Touch Focus, Face/smile Detection, HDR, Panorama | Phase Detection Autofocus, 1.25µm, f/1.8 aperture lens, 2x Optical Zoom, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | Phase Detection Autofocus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | 1080p@30fps | 2160p@30fps, 1080p@30fps, 720p@120fps | 1080p@30fps |
| Front Camera | 5 MP [Similar] | 20 MP (f/1.8, 1/2.8", 1.0µm), 1080p, Auto-HDR [Similar] | 8 MP (f/2.2) [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE, EV-DO Rev.A 3.1 Mbps, VoLTE | HSPA, LTE | HSPA, LTE |
| Bluetooth | v4.1, A2DP | 5.0, A2DP, LE | 4.2, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot | Wi-Fi 802.11 b/g/n/ac, dual-band, WiFi Direct, hotspot |
| USB | microUSB v2.0 | 2.0, Type-C 1.0 reversible connector | microUSB 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS, GLONASS, BDS | Yes, with A-GPS |
| Browser | HTML5 | HTML5 | HTML5 |
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| Internal | 32 GB, 3 GB RAM | 128 GB, 6 GB RAM or 64 GB, 4/6 GB RAM | 128 GB, 4 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 256 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) |
| 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 | 3000 mAh | 3010 mAh | 3400 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
