after 3 months i fix that probelm.. when u go to service center.. u need to replace motherboard, and it cost 80% of the the price..
i searching some article on internet, and watch some video on youtube.. the possible problem is the RAM. cz the chipset and RAM is piled up into one place.. and when the phone get heat, it can cause problem.
i had problem same with your probelm. first my wifi and hotspot didnt work, "error". and 3 month past my phone suddenly dead, can not to turn on.
solution :
1. if ur phone still had warranty, ur lucky.. go ahead to asus center.. they will give u new motherboard
2. if ur warranty is eshausted, go to service phone near you, "the trusted one" and say want to replace ram of ur phone.
if you force it to be repaired in a place where it is not genuine asus (asus center). will void the warranty period.
my asus rog phone 5s.. now work normal.. after upgrade ram from 8 to 12gb. the cost is 1/5 price of this phone, and until now i thik is worh it.
you can search my history reply about the issue here :
https://zentalk.asus.com/t5/rog-phone-5/rog-5-wifi-and-hotspot-not-working-error/m-p/387821#M14634
