Oneplus 4 Concept 2017 details are thin, but rumours claim that the next-gen OnePlus will feature a high-end metal casing, housing a Snapdragon 835 processor and a 5.5in QHD display, improving on the Full HD screen seen on the OnePlus 3T. There's also talk of a whopping 8GB RAM, a 21MP or 23MP rear-facing camera, a 4,000mAh battery and Android 7.0 Nougat.The OnePlus 4 - which could arrive branded OnePlus 5 due to the fact that the number four is regarded as unlucky in Asia - is expected to be the highest-spec OnePlus smartphone yet.