The main question is why custom roms-: Custom roms are nowadays widely used because they give us various customisations and increase ram management and speed of the smartphone. BUT THERE ARE SOME DISADVANTAGES OF CUSTOM ROM-: -You have to unlock bootloader in order to install them which further voids warranty. -You dont not obtain further OTA upgrades from the company -You can also brick your device AND I AM NOT RESPONSIBLE FOR ANY CASE as we can see that the advantages of custom rom are more than the disadvantages of installing a custom rom as some smartphones stop obtaining OTA upgrades from the company as the smartphones become old and company does not bother about them.M oreover the warranty expires over 1 year. So lets begin the process- 1.The first process is to unlock the bootloader of your smartphones.There are several ways to unlock bootloader in various smartphone. In my case (asus zenfone max pro m2) , the bootloader can be unlocked by the application provided by the as...