The software will work to unlock your device. Keep your device connected during this process. Once it's done, your iPhone will restart.
If you're actually trying to unlock an iPhone, I can help you with the if you tell me: Do you have access to a Mac or PC ?
PassFab iPhone Unlock is a software tool designed to bypass or remove the passcode from an iPhone, providing access to a locked device. It is particularly useful in scenarios where the passcode has been forgotten, the device is disabled due to multiple incorrect attempts, or the iPhone is second-hand and the previous owner's passcode is unknown.