Oppo R7 Plus is a dual-SIM flagship Android phablet, released by the Chinese manufacturer in May 2015. It has a 6″ 1080p AMOLED display, it’s powered by a 1.5Ghz octa-core Qualcomm Snapdragon 615 processor, has 3GB of RAM, and 32GB internal storage, which can be bumped up by a further 128GB using microSD. It has a 13MP camera with Schneider-Kreuznach optics, laser autofocus and 1080p video recording at 60FPS. The Oppo R7 Plus runs on an generous 4100mAh battery.
Oppo R7 Plus has not received the official Android Marshmallow support yet. Oppo might take a few more months to roll out the official update. Instead of waiting till then, you can install CM 13 custom ROM which will update R7 Plus to Android Marshmallow. A detailed guide to install this ROM is given below.