Root the Galaxy S3 GT-I9300

 

How to root the Galaxy S3 GT-I9300

Just 10 minutes, you can have full control of your Samsung Galaxy S3 by following these instructions:

• First you will need to download Odin. This is a desktop program that transfers to your phone the files necessary for root. Get it here.
• Next, you will need to download the root package. Find it here.

• Unzip the attached Odin.zip file using winzip or similar utility
• Unzip the CF-Root-SGS3-vX.X.zip
• Start Odin by clicking the .exe file
• Click the PDA button, and select CF-Root-SGS3-vX.X.tar
• Put your phone in download mode (turn off phone, then hold volume-down + home + power to boot – if it asks you to press a button to continue, press the listed button)
• (USB) Connect the phone to your computer
• Make sure Repartition is NOT checked
• Click the Start button
• Wait for Android to boot

Your Galaxy S3 will boot into ClockworkMod Recovery, just wait out the process, as it will reboot once again.
sumber:http://www.zoneandroid.com/cell-phone/root-the-galaxy-s3-gt-i9300/