| Oppo A91 |
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| Hardware and OS | Oppo A91 | |
| Operating system | Android 9.0 (Pie); ColorOS 6.1 | |
| Processor | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | |
| Chipset | Mediatek MT6771V Helio P70 (12nm) | |
| GPU | Mali-G72 MP3 | |
| Internal memory | 128GB 8GB RAM | |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Display | Oppo A91 | other phones |
| Type | AMOLED | |
| Size | 6.4" inc | |
| Resolution | 1080 x 2400 px | |
| Protection | Corning Gorilla Glass 5 | |
| Touchscreen | capacitive touchscreen | |
| Screen-to-Body Ratio | 85.5% | |
| Display area | 100.4 cm2 | |
| Display aspect ratio | 20:9 (height:width) | |
| Pixel Density | 408 PPI | |
| Colors | 16M | |
| Other | 430 nits typ. brightness | |
| Connectivity | Oppo A91 | other phones |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 1700(AWS) / 1900 / 2100 | |
| 4G Network | LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/ax, dual-band, Wi-Fi Direct, hotspot | |
| Network | GSM / CDMA / HSPA / LTE | |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| Bluetooth | 4.2, A2DP, LE | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS, GLONASS, BDS | |
| Speed | HSPA 42.2/11.5 Mbps, LTE-A | |
| USB | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | |
| Camera | Oppo A91 | other phones |
| Main camera | 48 MP, Quad | |
| Specs | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF -8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm -2 MP B/W, f/2.4, 1/5.0", 1.75µm -2 MP, f/2.4, 1/5.0", 1.75µm, depth sensor | |
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps, gyro-EIS | |
| Selfie camera | 16 MP, Single | |
| Multimedia | Oppo A91 | other phones |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | Oppo A91 | other phones |
| Colors | Dark Blue, Red, Blue | |
| Body build | Glass front (Gorilla Glass 5), plastic back, plastic frame | |
| Dimensions | 160.2 x 73.3 x 7.9 mm | |
| Weight | 172 g | |
| Battery | Oppo A91 | other phones |
| Battery capacity | 4025 mAh, Non-removable Li-Po | |
| Other | Oppo A91 | other phones |
| Release date | 2019, December | |
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
