MojoKid writes: Microsoft and Nokia have worked hard making Lumia smartphones difficult to break into at a low-level, but software hacker Heathcliff has just proven that it's not impossible. He's just released a solid-looking tool called Windows Phone Internals, and it can do everything from unlocking the bootloader to replacing the phone's ROM. WP Internals is a completely free download, though Heathcliff welcomes donations by those who've found the tool useful. According to the "Getting Started" section of the tool, supported models include Lumia 520, 521, 525, 620, 625, 720, 820, 920, 925, 928, 1020, and 1320. If your model is not on the list, the developer has said that he hopes to add more models in the near future.