ASUS Offers Official Bootloader Unlock Solution for the ZenFone 2

We need an unlocked bootloader in order to install custom ROMs onto a smartphone and this isn't always an easy thing to achieve. ASUS has realized the importance of community developer support and have announced a bootloader unlock tool for the ZenFone 2. Proceed with caution though because unlocking the bootloader will void the warranty of your device.

source: xdadevelopers