: After the "UNLOCK DONE" message appears, check the service menu by dialing *#*#7378423#*#* and navigating to Service info > Configuration to see if "Bootloader unlock allowed" is now "Yes".
: Run the tool as an administrator, enter your credentials, and connect the powered-off phone while holding the Volume Down button to enter flash mode.
: Install the specific Sony S1 bootloader drivers on a Windows PC. qunlocktool sony
: The primary use is to change the internal flag of a Sony device to allow bootloader unlocking.
The for Sony Xperia devices is a specialized third-party software utility historically used to modify a device's "Bootloader Unlock Allowed" status from "No" to "Yes" . This process is critical for users of carrier-locked models, particularly from Japanese carriers like Docomo or AU , who wish to install custom ROMs or gain root access. Key Features and Functionality : After the "UNLOCK DONE" message appears, check
: The tool requires a connection to a remote server and paid credits to function.
As of mid-2024 to 2025, several reports indicate the . : The primary use is to change the
: Some versions claim to assist with Factory Reset Protection (FRP) removal.
