Once the phone boots in, you will get a Android is upgrading.When it is successfully installed, go back and select reboot system now.Next, scroll down to install zip from sdcard and select the rooting package file TeamEpic-Root-from-Recovery-v5.zip and confirm the installation.Use the Volume keys to navigate and Power button to select. Release the power key then but keep the other 2 keys pressed till you see a menu in blue text. Keep these keys pressed until your phone vibrates and you see the Samsung logo with the device name. Now we need to reboot the device to boot it into the CWM mode: press and hold the Volume Up, Home and Power keys together.The installation will take a few seconds finishing the first part. Select the CWM recovery zip file and hit the Start button on Odin. Make sure to deselect the Auto Reboot and click on the PDA button.Once connected the ID:COM port at Odin box will turn blue and you see an Added!!. Run the Odin exe from the earlier downloaded file and connect your Samsung Galaxy S3 to computer.Now press the Volume Up key to enter into the Download Mode. Switch off your SGS3 and boot it into Download mode: hold the Volume Down, Home and Power keys simultaneously for a few seconds till you get a warning screen.Finally, download the rooting package ( TeamEpic-Root-From-Recovery-V5.Zip), do not extract it and copy it on your SGS3's memory. Required files: download ODIN ( Odin3-V3.07.Zip) and extract in your PC.
How to root and install ClockworkMod Recovery on Galaxy S3 LTE: Enable USB Debugging: Settings > Developer options.Make sure that Samsung USB Drivers for SGS3 are installed on your computer.Rooting does not wipe any data from your device but we recommend that you create backup of all your important data in your Galaxy S3.Charge you SGS3 to at least 70% of battery level.