LG G6 Plus US997U Stock Firmware Android Nougat 7.0 Updated KDZ File. Here you can Find LG G6 Plus Phone Official File And Complete Guide For How to install Stock ROM on LG US997U Device Just Follow Below Content Instructions. LG G6 Plus US997U Phone Specs And Nougat 7.0 Update Operating System: Nougat (7.0) Android Display: