Phone Comparison - Oppo A57 vs Oppo A3 vs vivo Y91i
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| Price Comparison (India) | - | - | |
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| Manufacturer | Oppo | Oppo | vivo |
| Announced | November 2016 | April 2018 | March 2019 |
| Status | Available - January 2017 | Coming Soon - May 2018 | Available - March 2019 |
| Price | Rs. 14,990 ($240.00) [Similarly Priced] | Rs. 21,000 ($315.00) [Similarly Priced] | Rs. 9,990 ($0.00) [Similarly Priced] |
| Colors | Gold, Rose Gold | Knight Black, Soybean Meal, Stardust Silver, Garnet Red | Fusion Black, Sunset Red, Ocean 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) |
156 x 75.3 x 7.8 mm (6.14 x 2.96 x 0.31 in) |
155.1 x 75.1 x 8.3 mm (6.11 x 2.96 x 0.33 in) |
| Weight | 147 g (5.19 oz) | 159 g (5.61 oz) | 163.5 g (5.75.0.18 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 CDMA 800 & TD-SCDMA |
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 1700(AWS) / 1900 / 2100 |
HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 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) | LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 40(2300), 41(2500) |
| Messaging | SMS, MMS, Push Mail, EMail | SMS, MMS, Push Mail, EMail | |
| Build Features | - Fingerprint Sensor - Metal Build - 2.5D Curved Glass | - | - |
| Notification LED | Yes | - | - |
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| OS | Android OS, v6.0 (Marshmallow) | Android 8.1 (Oreo) | Android 8.1 (Oreo) |
| User Interface | ColorOS 3.0 | - | Funtouch 4.5 |
| Processor | Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 | Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53), Mediatek Helio P60 | Octa-core 2.0 GHz Cortex-A53, Mediatek MT6762 Helio P22 (12 nm) |
| GPU | Adreno 505 | Mali-G72 MP3 | PowerVR GE8320 |
| RAM | 3 GB | 4 GB | 2 GB |
| Internal Memory | 32 GB | 128 GB | 16/32 GB |
| External Memory | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
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| Type | IPS LCD capacitive touchscreen | LTPS IPS LCD Capacitive Touchscreen | IPS LCD Capacitive Touchscreen |
| Colors | 16M colors | 16M colors | 16M colors |
| Size | 5.2 inches | 6.2 inches | 6.22 inches |
| Resolution | 720 x 1280 pixels (282 ppi) | 1080 x 2280 pixels (407 ppi) | 720 x 1520 pixels (270 ppi) |
| Screen-to-Body Ratio | 68.79% | 81.64% | 83.15% |
| 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 | 16 MP (f/1.8) | 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, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama | 13 MP, f/2.2, PDAF Panorama |
| Video | 1080p@30fps | 1080p@30fps | 1080p@30fps |
| Front Camera | 16 MP [Similar] | 8 MP (f/2.2) [Similar] | 8 MP, f/1.8 [Similar] |
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| GPRS | Yes | Yes | Yes |
| Edge | Yes | Yes | Yes |
| 3G | HSPA, LTE, VoLTE | HSPA, LTE | HSPA, LTE Cat4 150/50 Mbps |
| Bluetooth | v4.1, A2DP | 4.2, A2DP, LE | 5.0, A2DP, LE |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n, hotspot | Wi-Fi 802.11 b/g/n/ac, dual-band, WiFi Direct, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| USB | microUSB v2.0, USB Host | microUSB 2.0, USB On-The-Go | microUSB 2.0, USB On-The-Go |
| GPS | Yes, with A-GPS | Yes, with A-GPS | Yes, with A-GPS, GLONASS, BDS |
| Browser | HTML5 | HTML5 | Yes |
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| Internal | 32 GB, 3 GB RAM | 128 GB, 4 GB RAM | 16/32 GB, 2 GB RAM |
| Expandable Storage | microSD, up to 128 GB (uses SIM 2 slot) | microSD, up to 256 GB (dedicated slot) | microSD, up to 256 GB (dedicated 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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| 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-Po Battery |
| Capacity | 2900 mAh | 3400 mAh | 4030 mAh |
| Stand by | - | - | - |
| Talk Time | - | - | - |
Rs. 9,990 
