Your post is very useful, thanks. My phone also from banggood is on the way with international rom. Im going to flash stock cn/en rom and I just want to make sure that qfil and stock rom file is all I need? If I do it like this video says it will be ok ? Sorry if this question was answered before but I read about unlocking bootloader and flashing twrps and in the end I dont know If I have to do something more than use qfil.