You can verify your specific status by entering a hidden service menu: Open your phone's dialer and enter *#*#7378423#*#* . Navigate to > Configuration > Rooting Status . Look for Bootloader unlock allowed .
Sometimes, the bootloader is allowed, but the setting is disabled.
If the software methods fail, the "No" status is likely a carrier-enforced lock that requires server-side intervention or specialized tools. qUnlocktool / S1 Tool: bootloader unlock allowed no to yes
For many carrier-branded phones, the bootloader unlock status is directly tied to the SIM lock status.
Inside Developer Options, look for the toggle. If this switch is turned off or greyed out, your device will display "Bootloader unlock allowed: No." If it is available, toggle it On . 3. Check SIM and Network Status You can verify your specific status by entering
: Usually, the original network provider requested that Sony permanently lock the bootloader to prevent users from modifying firmware while under warranty or contract. Methods to Change Status from "No" to "Yes"
For Android enthusiasts, the bootloader is the gateway to true device ownership. It’s the first piece of software that runs when you power on your phone, telling the system which operating system kernel to load. Unlocking it allows you to install custom ROMs, gain root access, flash modded kernels, or recover a "bricked" device. Sometimes, the bootloader is allowed, but the setting
Contact your carrier's customer support and request a network/SIM unlock.