The raw exploits to work around the locked bootloaders on some Galaxy S4s is released
On the heels of the release of the Galaxy S4 on Verizon, Android security researcher Dan Rosenberg has released the tools and files needed to work around the bootloader security of the AT&T and Verizon versions of the Galaxy S4. Unlike the other versions of the S4, the versions built for America's two biggest carriers have an extra security layer at the bootloader level, which makes it a bit difficult to flash a custom recovery or boot image to the device.
Rosenberg's tools work around these issues, and allow the user to flash custom kernels and recoveries on the AT&T and Verizon branded Samsung Galaxy S4.
It's worth noting that these aren't for the novice, so you might want to wait a day or two to see what other developers can build using the new bootloader tools. Hopefully, something simple and sane can be made for those folks who want or need to do a little magic on the software of their Galaxy S4. See the links below for more information.