Verizon added additional anti-root code

[Dave4321]

Developers will have to figure a way around it before we can root.
[KERNEL] SCH-I535 (Galaxy S III VERIZON) ROOTED INSECURE KERNELS - IMPORTANT INFO! - xda-developers

 

[Dave4321]

Sorry duplicate thread
http://forums.androidcentral.com/verizon-galaxy-s-iii/187041-gah-protected-bootloader.html