Hirunning Android 7.i the bootloader is

[vibeboyr]

 I am using Asus Zenfone 3 max zc520tl . I need to root it.but the bootloader is locked.i tried official unlock tool for my phone.it doesn't work.can anyone know how to unlock bootloader through adb.please tell me

[fussion_ASUS]

Hi, as the device is too old the support may be limited. I will get back to you for this once I get more info.