I have a E975,i've changed some roms and been messing with my phone and got a lollipop rom that i really like,working perfectly BUT It has changed the model number from E975(The actual model number) To "Optimus G" And now i cant root or do anything,ive been trying to install cyanogenmod 12 but it crashes on the setup wizard,i can still access bootloader but supersu app just wont work,and i cant edit system files etc etc,and i tried to root but it wont work. :'(