Oppo A91 is another latest A-series smartphone from Oppo and is launched in December 2019. It offers 6.4 Inches FHD+ AMOLED Display with 7.90 mm thickness and weighs 172 g. It is powered by Android 9 Pie with ColorOS 6.1 and Octa-Core Processor (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53). It is packed with 48 MP + 8 MP + 2 MP+ 2 MP quad rear cameras with LED flash and Auto Focus along with 16 MP secondary camera. It also comes with Dual SIM support, Li-Po 4000 mAh Non-Removable Battery with 30W fast battery charging, 128 GB internal memory and a RAM of 8 GB. Some of the features like in-display fingerprint, Bluetooth 5.0 v, Face recognition, GPS, GLONASS, Wi-Fi, Micro USB 2.0 v and VOOC Flash Charge 4.0.

Features and Specifications
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|---|---|---|
| General | 2G Network | GSM 850/900/1800/1900 MHz CDMA 800 MHz |
| 3G Network | HSDPA 850/900/1900/2100 MHz WCDMA 2000 1xEV-DO | |
| 4G Network | LTE 850/900/1800/1900/2100/2300/2500/2600 MHz | |
| SIM | Dual SIM (Nano-SIM) | |
| Dimensions | 7.90 mm Thickness | |
| Weight | 172 g | |
| Colors | Blue, Red, Dark Blue | |
| Display | Type |
FHD+ AMOLED Touchscreen (16M Colors)
Waterdrop Notch Display |
| Screen Size | 6.4 Inches | |
| Resolution | 2400 x1080 Pixels (411 ppi density) | |
| Sound | Loudspeaker | Yes |
| Camera | Primary | Quad Cam: 48 MP + 8 MP + 2 MP+ 2 MP with LED Flash and Auto Focus |
| Secondary | 16 MP | |
| Memory | SD Card Slot | Yes, Expandable up to 256 GB (dedicated slot) |
| Internal | 128 GB | |
| RAM | 8 GB | |
| Data/Connectivity | GPRS | Yes |
| Speed |
HSPA 42.2/5.76 Mbps, LTE
| |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac with Wi-Fi Direct and Hotspot | |
| Bluetooth | Yes 5.0 v | |
| Headphones | 3.5 mm Audio Jack | |
| USB | Micro USB 2.0 v, Type-C Connector | |
| Radio/FM | Yes | |
| GPS | Yes A-GPS, GLONASS | |
| Software/Hardware | OS | Android 9 Pie with ColorOS 6.1 |
| CPU/Chipset | Octa-Core Processor (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | |
| GPU | Mali-G72 MP3 | |
| Sensors | Accelerometer, Light, Proximity, Gravity, Distance, and In-display Fingerprint | |
| Browser | HTML5 | |
| Messaging | SMS, MMS, E-Mail, Push Mail, IM | |
| Battery | Capacity | Li-Po 4000 mAh Non-Removable Battery 30W Fast Battery Charging (VOOC Flash Charge 4.0) 50% Charge in 30 Minutes |

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