[Guide] How to Install ClockworkMod Recovery, Root and unlock bootloader on Samsung Galaxy S III for Verizon

The Samsung Galaxy S III for Verizon will receive and Android Jelly Bean update sometime soon, but if you are an impatient user who wants to install the update right now you are in luck. The recently leaked K3 build for the Galaxy S III is apparently the final version which Verizon will release to their users. But in order to install the leaked ROM you will have to prepare your device first.

So you can use the following step-by-step guide on how to Install ClockworkMod Recovery, Root and unlock the bootloader on the Samsung Galaxy S III for Verizon.

[NOTE] We do not recommend installing custom ROMs or rooting your device unless you are familiar with the consequences of making a mistake while you follow this guide. Improper use of this guide can result in loss of data or device malfunction, so please proceed at your own risk.

[NOTE] Please make a backup of your data before you proceed. The developer of the process has assured users that your data/apps/settings and internal storage partition will be kept in tact, but we feel it is always best to backup your data before proceeding with such guides.

• Download and install official Samsung USB drivers.
• Download  and extract ODIN 3.07
• Download SuperSU (Root)
• Download unlocked bootloader for the Galaxy S III for Verizon.
• Download SU + Unlocked bootloader.
• Download VRBLK3 Bootchain with ClockworkMod Touch Recovery 6.0.1.2
• Download VRBLK3 Bootchain with TWRP Recovery 2.3.1.0
• Download Stock VRBLK3 Factory Image with No Data Wipe

 
Step 01 - Flashing the Factory Image

1. Boot your device into ODIN mode. You can do this by:
   • Make sure your device is completely off
   • Key Combos: Volume Down + Home
   • While holding both of them simultaneously press the Power button until you see a disclaimer on the screen
   • Then press Volume Up and Power to accept the disclaimer
   • Once the green robot is visible on the screen this indicates that handset is in now ODIN/Download mode
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2. Flash the Stock VRBLK3 Factory Image with No Data Wipe on to your device using ODIN.
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3. Once you reboot you will be running Jelly Bean with all your apps data and storage content in tact

 
Step 02 - Flashing the Factory Image

1. You can use one of the following Recovery options you downloaded previously.
   • VRBLK3 Bootchain with ClockworkMod Touch Recovery 6.0.1.2
   • VRBLK3 Bootchain with TWRP Recovery 2.3.1.0
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2. Boot your device into ODIN mode (refer above)
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3. Flash the recovery image to your device using ODIN (HOW TO)
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4. Once your device reboots, you should be able to boot into your recovery of choice (HOW TO)

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Step 03 – How to Root and unlock bootloader

1. You can use either Super SU, unlocked bootloader or SU+Unlocked bootloader based on your requirement.
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2. Boot your device into recovery mode
   • Make sure your device is completely off
   • Press Volume Up + Home
   • While holding both of them simultaneously press the Power button
   • As soon as the phone vibrates, let go of the Power button but keep holding Volume Up + Home
   • When you see the "Samsung Galaxy S III" logo (not just the word "Samsung"), right after that, the next screen you should see is your recovery.
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3. Flash the download you choose from above using custom recovery.
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4. If you choose option 3 your ROM will be fully rooted with an unlocked bootloader allowing you to flash additional custom ROMs

  Now that you have install ClockworkMod Recovery, Rooted and unlocked the bootloader on your Galaxy S III you can also install the leaked K3 update on your device.   [SOURCE] All credit to the content of this guide belongs to the XDA Developers Forum and the individual developers responsible for the methods.