Step 7. Next, unzip the ODIN zip file and run the ODIN exe program by double-clicking on it.
Step 8. Power off your phone, unplug the microUSB cable then hold down Volume Down, Center Home, and Power button together until you see a warning screen like below:
Step 9. Reconnect the micro-USB cable from phone to your computer.
Step 10. Make sure you see a blue-highlighted box with a random COM number. If you don’t see this, run the Samsung USB driver exe file you downloaded earlier and that will install the proper Windows drivers. You should be able to see it after that.
Step 11. Choose AP, then choose the TWRP tar file you downloaded earlier.
Before you hit Start button, make sure you are ready to press the Volume Up, Center Home, and Power buttons together when your phone reboots. Hit the Start button and when your phone’s screen turns off to reboot, immediately hold down those buttons to get into TWRP recovery.
Step 12. Once in TWRP recovery, you may want to backup your stock kernel before installing the new custom kernel. So, choose “Backup”, then backup the boot image only.