When you find that your Android device—specifically a Sony Xperia—lists in the service menu, it generally indicates a hardware or carrier-level restriction that prevents standard unlocking procedures.
While Sony’s official developer site states that if it says "No," the device cannot be unlocked, several community-driven workarounds have been discovered over the years. 1. Disabling "My Xperia" (The Easiest Fix) bootloader unlock allowed no to yes
In many instances, the bootloader lock is tied directly to the SIM lock. When you find that your Android device—specifically a
Restart the device and check the service menu again. In some cases, the status immediately flips to . 2. SIM Unlocking the Device " the device cannot be unlocked