Phone Comparison - Vivo Y66 vs Xiaomi Redmi 4 (India) vs Oppo A71
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| Price Comparison (India) | - | ||
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| Manufacturer | vivo | Xiaomi | Oppo |
| Announced | December 2016 | May 2017 | September 2017 |
| Status | Available - December 2016 | Available - May 2017 | Available - September 2017 |
| Price | Rs. 14,990 ($216.00) [Similarly Priced] | Rs. 6,999 ($110.00) [Similarly Priced] | Rs. 12,990 ($199.00) [Similarly Priced] |
| Colors | Gold | Matte Black, Gold | Gold, Black |
| Form Factor | Candybar | Candybar | Candybar |
| Dimension |
153.56 x 75.79 x 7.49 mm (6.05 x 2.98 x 0.29 in) |
141.3 x 69.6 x 8.9 mm (5.56 x 2.74 x 0.35 in) |
148.1 x 73.8 x 7.6 mm (5.83 x 2.91 x 0.3 in) |
| Weight | 157 g (5.54 oz) | 150 g (5.29 oz) | 137 g (4.83 oz) |
| SIM Type | Dual SIM Hybrid (Nano SIM + Micro SIM, or Micro SIM + microSD Card) | Dual SIM Hybrid (Nano SIM + Micro SIM, or Micro SIM + microSD Card) | 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 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 / 800 - Taiwan | HSDPA 850 / 900 / 1900 / 2100 |
| 4G Network | LTE band 1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) | LTE band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 26(850), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Taiwan | LTE |
| 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 - Infrared Sensor - Metal Build |
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| Notification LED | Yes | Yes | Yes |
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| OS | Android OS, v6.0.1 (Marshmallow) | Android OS, v6.0.1 (Marshmallow) | Android OS, v7.1 (Nougat) |
| User Interface | FunTouch OS 3.0 | MIUI 8 | ColorOS 3.1 |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8937 Snapdragon 430 | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 | Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53), MediaTek MT6750 |
| GPU | Adreno 505 | Adreno 505 | Mali-T880 MP2 |
| RAM | 3 GB | 2/3/4 GB | 3 GB |
| Internal Memory | 32 GB | 16/32/64 GB | 16 GB |
| External Memory | microSD, up to 128 GB | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (uses SIM 2 slot) |
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| Type | IPS LCD capacitive touchscreen | IPS LCD Capacitive Touchscreen, 2.5D Curved Glass | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.5 inches | 5.0 inches | 5.2 inches |
| Resolution | 720 x 1280 pixels (267 ppi) | 720 x 1280 pixels (294 ppi) | 720 x 1280 pixels (282 ppi) |
| Screen-to-Body Ratio | 71.66% | 69.95% | 68.41% |
| 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 | 13 MP, 4160 x 3120 pixels | 13 MP |
| Flash | LED Flash | Dual-LED (dual Tone) | LED Flash |
| Features | AutoFocus, Geo-tagging, Touch Focus, Face/smile Detection, HDR, Panorama | Phase Detection Autofocus, f/2.2 aperture, Geo-tagging, Touch Focus, Face Detection, Panorama, HDR | Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 5 MP [Similar] | 5 MP [Similar] | 5 MP, f/2.4 [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 42.2/5.76 Mbps, LTE Cat6 300/50 Mbps, VoLTE | HSPA, LTE, VoLTE |
| Bluetooth | v4.1, A2DP | v4.2, A2DP, EDR, LE | 4.2, A2DP |
| Wi-Fi | Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, hotspot |
| USB | microUSB v2.0 | microUSB v2.0, USB OTG | microUSB 2.0 |
| 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 | 16/32/64 GB, 2/3/4 GB RAM | 16 GB, 3 GB RAM |
| Expandable Storage | microSD, up to 128 GB | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (uses SIM 2 slot) |
| 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 | 3000 mAh | 4100 mAh | 3000 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 6,999 
Rs. 12,990 
