iPhone 3GS (JB) won't restore or update, just want phone back to normal

[upagainst]

I recently got a 3GS and tried out jailbreaking for a while and would now like to go back to regular just because I'd like to feel safer about the warranty. I've been having so many problems when trying to restore. I'm using 3.0.1 and trying to restore from ipsw files that I have from a tutorial that I used to jailbreak.

I keep on getting error 4 when trying to restore, and it's beginning to scare me. How do I get my iPhone back to normal?

 

[upagainst]

"The Iphone could not be restored. An Unknown error occurred (-4)"

Also, I just wanted to confirm that I'm using the latest version of iTunes.

 

[RAGING DEMON]

I recently got a 3GS and tried out jailbreaking for a while and would now like to go back to regular just because I'd like to feel safer about the warranty. I've been having so many problems when trying to restore. I'm using 3.0.1 and trying to restore from ipsw files that I have from a tutorial that I used to jailbreak.

I keep on getting error 4 when trying to restore, and it's beginning to scare me. How do I get my iPhone back to normal?

THE MORAL OF THE STORY...! DO....NOT....JAILBREAK.... YOUR.... IPHONE....!

 

[Moi un Mouton]

You have to restore it to 3.1.2, iTunes no longer allows the older firmware to be put on 3GS's