hi

is it a chip exactly upper than Fresco Logic FL1100-1A0-LX USB 3.0 host controller?(or i mis-steakin?)

and abut how repairable is this phone: well it is kinda bad that you need a lot of work to fix it but think from different angle, it will be more shock prof than almost every other phone!

to metal plate supporting internal components!

and most likely if you send it for warranty they will replace it with new one!