So i have been trying to root my s6 running nougat 7.0 using apps such as kingoroot but non work. The problem i have is my usb has stopped working ( no usb options and no fast charge) i have tried usb debugging and the *#0808# and non of it works i have also tried 4 different usb cables including the one that came with it and the one from my tablet. I know that nougat is whats stopping kingo from working so can i roll back my android version without a pc? Plix halp