I want to root my device and Install custom ROM (HAVOC OS) and custom kernel version So that i can get rid of this BLACK SCREEN, Automatically restarting while playing pubg, shut down during charging etc problems.?
It's better if you keep your bootloader locked, your warranty will be voided as soon as you unlock the bootloader. For Automatic restart, sorry to hear about this. Kindly visit the nearest service center: Due to the lockdown, service centers may not be functional. Kindly call the service center before you visit one. https://www.asus.com/in/support/service-center/india
It's better if you keep your bootloader unlocked, and yes will avoid warranty reminder warranty is for software stuff No risk at just keep unlock bootloader most android phones has option to enable and disable bootloader with warranty but asus playing very safe here not even allowing bootloader unlock If any of there update messup your phone you can fix your self instead waiting for them For rom and root if you apply any 3rd party rom you will not able to use air trigger and vibration partten ,x mode,back light other main features etc But you can root and flash some stable version of stock rom