I’m curious to know if anyone here has a block diagram of the electronics of the FP4. Electronics engineers and systems engineers will likely know what I mean - the sort of ‘overview’ diagram you put in Powerpoint presentations when engineers talk to managers 
I’m curious to know how the phone is built up and wonder if there’s anything out there. Something more than ‘these are the modules you can replace’ and less than a circuit schematic. More of a description of the phone as a set of subsystems.
Just my own curiosity. I don’t know much about modern smartphones and the FP4 is potentially one of the most accessible in terms of what’s inside.