Welcome to the community 
In what state is your phone right now? 
Don’t follow the steps above, that’s the old way, the FP4 is now supported by the (much safer) device-flasher, have a look at the official instructions.
Welcome to the community
In what state is your phone right now?
Don’t follow the steps above, that’s the old way, the FP4 is now supported by the (much safer) device-flasher, have a look at the official instructions.