<HOW TO> Easy Guide to Using Odin/Unbricking Your Phone
I have noticed that while there are many guides to do this, people still ask the question in threads, so I'll simplify it here. It is meant as an Odin helper.
Make sure you have downloaded the files you need (firmware and odin) from the bottom of this post. I have only included Odin v3.1 and the needed file for UCJF6 restore, cause the jh3 and other stuff is too big to upload directly. This Odin works with all firmwares. Just d/l the desired firmware and use this odin to flash. Just unzip both my files and there you go.
1 - PHONE MUST BE POWERED OFF (not plugged in and pull the battery for 5 seconds if you have to).
2 - Open Odin and choose the files you need. Do everything EXCEPT press start.
3 - HOLD BOTH volume buttons and, while holding them, count to 2 then plug in usb and wait 2-4 more seconds. Phone will enter download mode and Odin will recognize it on a COM.
4 - Press start in Odin. When it completes and your phone reboots, close Odin.
5 - BE PATIENT!!! Your phone may now appear to stick on one of the boot screens or a blackscreen, but it is really doing stuff. Wait 5-10 minutes before you impatient people decide it didnt work.
I can only say this: THIS METHOD HAS NEVER FAILED FOR ME
I hope this helps someone, as someone was kind enough to do for me.....
Enjoy, and happy modding! =)