replace for what?
To fix sim signal. (Tested G920F)
But did the signal and the audio work?
Just replace "system/vendor/firmware/" folder to fix sim signal.
Just flash this via recovery and then execute 'userinit.sh' located in '/data/local/' with root explorer.
Flash this via recovery
I have the w8 edge variant. Didnt do anything special flashed rom then arter kernel su then the mm call fix for my variant. But i could not get root to work so jumped off.
Just flash SuperSU via recovery and then go to "Settings > Permissions ...