Received an email from ASUS support today:
"As your case, we regret to inform you that ASUS has not official information about release unlock bootloader for your device. Therefore, I am unable to inform when unlock bootloader tool will be released. Your concerns will be forwarded to relative department. Please stay tuned for more news on our support website.
Thank you for your patience and understanding. "
"As your case, we regret to inform you that ASUS has not official information about release unlock bootloader for your device. Therefore, I am unable to inform when unlock bootloader tool will be released. Your concerns will be forwarded to relative department. Please stay tuned for more news on our support website.
Thank you for your patience and understanding. "