in the service menu, it typically means the carrier or manufacturer has permanently hard-locked the bootloader to prevent modifications. This status is different from the "OEM Unlocking" toggle in settings; if it says "No" here, standard unlock commands will fail even if you have an official unlock code. 1. Check Your Actual Status
Knowing the model and carrier (e.g., Xperia 5 IV Go to product viewer dialog for this item. bootloader unlock allowed no to yes
Once the toggle says "Yes" and is enabled: in the service menu, it typically means the
Sometimes the flag is "No" simply because the OS hasn't granted permission yet. Check Your Actual Status Knowing the model and carrier (e
On some older Sony tablets and phones, certain system apps can block the status. Go to and disable the "my Xperia" app.
Changing the status of is generally not possible through standard software settings, as this restriction is typically hardcoded by manufacturers at the request of cellular carriers . For most Android devices, especially Sony Xperia and certain carrier-branded Samsung models, if this status is set to "No," the device is permanently barred from official unlocking to prevent unauthorized firmware modifications that could void warranties or bypass security. Why is the Status Set to "No"?