Bootloader Unlock Allowed No To Yes ◎ 〈ESSENTIAL〉

: As a last resort, replacing the motherboard with one from a non-carrier-branded (International/Global) version of the same phone will change the status to Yes . Standard Unlocking Process (If Allowed: Yes)

With the barrier removed, Alex could finally follow the official Sony Bootloader Unlock process: bootloader unlock allowed no to yes

Your device will guide you through the unlocking process. Confirm that you want to unlock. : As a last resort, replacing the motherboard