i test by myself on v8 and its work heres the link :
how about the reboot issue?
no need flash firmware/modem? if need which version?
i have my own steps that i found it by my self but it will earse all ur data so backup ur data to pc.
here are the steps :
1. make sure u have unlocked bootloader, custom recovery (twrp) i prefer use blu_spark twrp latest version
2. pur ur 3.5.x ...
I have good and bad news.
I will start with the good one.
I fixed the FC issues, i have rebooted multiple times and no FC anymore.
the bad one.
I wont do it today. I I can not make a fresh and clean build in time.. I have to go to sle...