The Samsung Galaxy S III is quite possibly one of the best phones ever made, so far as I’m concerned.
The fast processor, crisp display and the fact that nearly every version of the Galaxy S III comes with an unlocked bootloader — except Verizon’s — has lead to its fast and enthusiastic adoption within the developer community. That’s why you should check out the Samsung Galaxy S3 Toolkit put out by developer/XDA Moderator Mark Skippen, aka mskip.
Don’t let the command line interface fool you into thinking that this is going to be difficult to use — it’s not.
The most important thing to do is to make sure that you download the correct version of the toolkit based on your model of the S III.
Verizon reps confirmed today that it is locking the bootloader on its Samsung Galaxy S III units. So this tool won’t work for users there. For everyone else, it’s an easy ride.
Just load the sofware and choose option 1 to install the correct USB drivers. Then just choose option 2 to root your phone.
You get a few Rooting Options in the tool — this is in case you only want to root your phone and don’t want to install ClockworkMod Recovery.
But I recommend option 3 for the “ALLINONE” rooting/recovery combo.
At this point all you have to do is follow the steps on the screen and enjoy an awesomely-rooted phone.
Keep in mind that this will probably void your warranty and if done incorrectly could break your phone. If you’ve used the tool I’d recommend supporting it by donating a little money to the developer.