I looked at this guide and have tried the steps, but when it comes to step 13 it always fails:
Now, hit the START button to begin the flashing process. When it finishes, your phone will automatically reboot, upon which you can unplug the cable. Plus, you’ll get a PASS (with green background) message in the left-most box at the very top of the Odin.
IMPORTANT Note: If ODIN gets stuck at some stage and doesn’t seem to be doing anything, do this — disconnect the phone from the PC, close ODIN, remove battery, re-insert it, turn phone on in Download mode again, and do the procedure again from Step 9. Same if you get a FAIL message in Odin.)
It always says
FAIL in Odin no matter how many times I do what the guy says.
I want to root my Galaxy S and flash an Android 4 ROM but first I have to change the baseband version. (I've tried the superoneclick method and it didn't work for me.)