Welcome to the club. You wont be getting any reply here other than "Replace Motherboard at Service center". No news if any update is going to be rolled out to fix it, so please feel free to wait or reach out to Service center before warranty expires....
So ASUS managed to brick its Premium series phones with just an untested STABLE update and do nothing about it for two months... It seems there won't be any official statement released on this issue and that implies no update is going to be pushed an...