Verizon’s Galaxy S III comes with a locked bootloader, although this hasn’t stopped user rooting the device and installing custom ROM’s on the handset, and now an unsecure bootloader has been leaked for the Galaxy S III on Verizon.
The guys over at the XDA developers forum have listed details on how you can use the unsecure bootloader on your handset, although it comes with the usual warnings.
Let me make this clear. If Samsung updates your device’s bootloaders, using this tool could potentially brick your device. Once you apply this, never accept a factory update without first flashing the Odin Packages in the Original Post of this thread. As a general rule, you want to be the last guy to apply any Samsung update. Run custom.
You can find out more details about the unsecure bootlaoder for the Samsung Galaxy S III on Verizon wireless over at the XDA Developers forums.
Source Android Police