2.1 jailbroken and confused as to how to upgrade

[konto77]

So i have a 2.1 jailbreak and am wondering how to unjailbreak. Because then I want to update to 2.2 and maybe jailbreak that then.
Also, what happens if my computer crashes during an iphone restore?

Thank you to everyone on here that answers questions like this. Too many of us, including me, are here just to get answers and not help out other users.

[captainjapanicq]

Here is a link to tutorials on how to update and then jailbreak 2.2 Enjoy.

Windows: http://www.iclarified.com/entry/index.php?enid=1881

MAC : http://www.iclarified.com/entry/index.php?enid=1842