Unlike older legacy tools that used simple username/password combinations stored locally, UnlockTool binds your license to your specific computer hardware. When you activate your license for the first time, the tool generates a unique and sends it to the UnlockTool server. The server then stores this HWID alongside your license key.
The phone’s activation server attempts to re-validate the device, rewriting the missing activation record. activation record does not exists unlocktool