None of you have even asked what phone he has. Don't do Spirit unless you have a 3GS. If you do, carry on.
I have a 3G and used spirit. Worked great
Why shouldn't I have used it?
I have a 3GS
So, carry on, as I said above. Spirit is all you can use for an untethered jailbreak.
It's not that reliable, it's not needed, and it can easily be blocked by Apple (don't ask me for the details on this one). I mean, how hard is it to use Redsn0w? Or PwnageTool?
What? That is the first I have ever heard of that. I have used spirit on 4 separate 3G iphones and all worked flawlessly
Care to point me to these documented issues?
I have jailbroke 9 3gs and 17 3g iPhones so far with spirit and no problems. with pwnage tool you have to use a mac and I have had more problems with redsnow and quite honestly I wont use it again. Im not saying it is bad its just not good to me!! lol.
always backup your iPhone before you jailbreak but there is no need to do a clean install or update before you do it. unless you are currently having problems that may be software related.
and another thing I will never update with iTunes again. I will sync but thats as far as it goes.