Those of you who purchased a Samsung Galaxy S III on Verizon and were disappointed upon finding out that its bootloader was encrypted (not-unlockable) may now rejoice. An insecure bootloader is now available for the device. For those unaware, here is the back story: The Verizon Galaxy S III is probably the first Android device by Samsung that shipped with an encrypted bootloader, making it harder to root and sparking a petition by the community. Based on Samsung’s track record of always shipping devices with unlocked bootloaders, we can all safely deduce that Verizon is the one to blame here.
The devs here at XDA came to rescue shortly and it was rooted, but custom ROMs and kernels were still a no-go. Our developers didn’t give up, and soon we had a proof-of-concept method of bypassing the locked bootloader for custom kernel installation. Finally, in the true spirit of XDA, our very own XDA Elite Recognized Developer AdamOutler got to work on the encrypted bootloader and now we have the results!
You can install the insecure bootloader on your Verizon SGS III using the method provided in detail in this forum post. The tools also allow you to root the device, install hacking tools, flash CWM recovery, and much more. You will need to be running Linux or Mac OS X to load the required tools.
Note that once you unlock your device using this method, do NOT accept any OTA update that you get afterwards. It may possibly brick your device. If you must, first flash the full ODIN stock restoration packages provided in this post, or simply stick with custom ROMs. Also note that Samsung or Verizon may break this method in the future, but there is an exploit waiting for when that happens. Enjoy!_________