My iPod touch is stuck in recovery mode, and when iTunes asks me to restore the device. When I try to restore it, iTunes says "This device isn't eligible for the requested build". I understand apple doesn't issue OS 3s anymore. So I downloaded OS 4.0 for iPod touch from: http://www.felixbruns.de/iPod/firmware/ So I tried to restore it using that OS. Now I get the error: "An unknown error occurred (13)". After this the screen goes completely black but doesn't turn off. If I restart the iPod Touch it's back on recovery mode. I also looked around the forum and found out about ZiPhone, tried to use it but it can't detect my iPod touch (iTunes detects it though). So far nothing solved the problem. My iPod touch is still stuck on recovery mode, I would honestly appreciate the help.