ตามนี้เลยครับ http://forum.xda-developers.com/showthread.php?t=2439667

แปะให้ตามนี้

1. Download this file: http://goo.gl/yZRXnd <— HELP ME! OR http://goo.gl/U6Jwaf <— Non ref
อันนี้คือลิงค์นี้ครับ http://www.mgyun.com/vroot

2. Install the software, using the installation buttons as you would on any other windows installation.

3. When you have installed it, you will see a green button, press it. Then connect your phone (JellyBean update would be best, i havent tried with ICS)

4. When the phone is connected the software will recognise the phone and the green button will show "ROOT", click on it.

5. The phone is going to be rooted in some seconds and the process is finished when it will show a tick on the software.

6. The phone will reboot.

7. When it is rebooted, go to google play and download super su.

8. Open super su and it will ask you to update the binaries, and you must click on update, and then normal.

9. A window in chinese will pop up on the phone, this is the screen that allows you to give root permissions to any app. You must click the button on the right.

10. You are done! Root process is complete!
***

ผมลองแล้วก็เรียบร้อยง่ายดายดีไม่มีปัญหาอะไรนะครับ ขอให้โชคดี