Having trouble while unlocking bootloader of Verizon Galaxy S III? Than here’s the app for you which will do all that for you in just one click. The app named EZ Unlock is developed by some developers over XDA forums. Currently it supports Mac and Linux but Windows users will get access today.
E-Z Unlock only unlocks Galaxy S III only if you want to lock it again than it is of no use to you. You can download this App from Play store now as its available for download. Root, messing with your phones bootloader, and software hacks almost always result in a voiding of your warranty.
Manually it is also simple but you need to type some commands in ADB.