This status indicates that your device’s bootloader – either by user request or officially supported methods. It’s often a flag set by the manufacturer or carrier.
On some older Sony tablets and phones, certain system apps can block the status. Go to and disable the "my Xperia" app. bootloader unlock allowed no to yes
When Sony introduced its "Bootloader Unlock" web portal—a pioneering service that allowed users to officially unlock their phones—it came with a caveat. The service checked the phone's IMEI (International Mobile Equipment Identity). If the phone was a carrier-branded model (like those sold by Vodafone or T-Mobile) or a specific regional variant, the server would return a failure message. How to Change "Bootloader Unlock Allowed: No" to
Here’s a short blog post explaining what means and how to change it to “Yes” (when possible). Go to and disable the "my Xperia" app
Before trying to change the setting, you must understand the two distinct layers of Android security:
series), a free community exploit called was released recently.