Oppo A37 smartphone specs & features are: Android operating system with Lollipop 5.1 version, Quad-core 1.2 GHz processor, 5 MP front facing camera and 8 MP main camera, Wi-Fi, Bluetooth and memory card slot which can be expanded to maximum 128GB.
Oppo A57 smartphone specs & features are: Android Marshmallow based ColorOS 3.0 version, Octa-core 1.4 GHz, 16 MP front facing camera and 13 MP main camera, Wi-Fi, Bluetooth and memory card slot which can be expanded up to maximum 256GB via Micro SD.
Oppo F3 is a 5.5-inch touchscreen with 1080 x 1920 display resolution. It has 1.5GHz octa-core Mediatek MT6750T processor with 4GB RAM and 64GB internal memory which can be expanded up to 128GB via MicroSD card. It has dual front cameras of 16MP and 8MP resolution and 13MP rear camera.
5.2 Inch HD (720 x 1280 Pixels) IPS LCD Display Android 7.1 Nougat OS Qualcomm Snapdragon 450 Chipset 2GB of RAM 13.0 MP Rear Camera with LED Flash 5.0 MP Front Camera Dual SIM 16GB Internal Storage Expandable Up to 256 via microSD 4G LTE, 3G HSPA+, 2G EDGE & GPRS Networks Wi-Fi 802.11 b/g/n Bluetooth 4.2 MicroUSB 2.0 3.5mm Audio Jack 3000mAh Battery
Oppo A83 - is a Dual SIM smartphone with 5.7" screen 720 x 1440 pixels. It has 13MP rear camera and 8MP front camera. Under the hood it holds Mediatek MT6763T Helio P23 Octa-core processor at 2.5GHz processing speed. It runs Android Nougat operating system with 3GB RAM and 32GB internal memory. It has a battery capacity of 3180mAh and microSD card slot up to 256GB.
Oppo F3 Plus powered by octa-core Qualcomm MSM8976 Pro snapdragon 653 processor and it comes with 4GB of RAM. The phone packs 64GB of internal storage that can be expanded up to 256GB via a microSD card. As far as the cameras are concerned, the Oppo F3 Plus packs a 16-megapixel primary camera on the rear and dual 16MP and 8MP front shooter for selfies.
Oppo F5 - is a 6-inch touchscreen with 1080 x 2160 display resolution. It has 2.5GHz octa-core Mediatek MT6763 processor with 4GB RAM and 32GB internal memory which can be expanded up to 256GB via MicroSD card. It has front camera of 20MP resolution and 16MP rear camera. It runs Android Nougat and has facial recognition to unlock feature. It has 3200mAh battery capacity.
Android Nougat 7.1 with Color OS 3.2 6-inch Full HD IPS LCD Display 16MP Front Camera 13MP Rear Camera 3GB RAM + 32GB ROM 2.5GHz MediaTek MT6763 octa-core processor ARM Mali G71 MP2 770MHz Triple slot tray: 2 SIM cards + 1 for microSD card Fingerprint Scanner Battery: 3200mAh