How to fix error 3194, 1600, 1602, 1013, 1015, 20 on iPhone 4, 3GS, iPod touch 4G, 3G, iPad 2 (wifi) and iPad 1 (Windows)

This video will show you how to fix the most common errors associated when downgrading your iOS. DOWNGRADE AT YOUR OWN RISK! I AM NOT LIABLE IF ANYTHING UNEXPECTED HAPPENS TO YOUR DEVICE. IF YOU ARE HAVING ISSUES DOWNGRADING, YOU WILL HAVE TO RESTORE YOUR DEVICE.

Links:

ALL FIRMWARE DOWNLOADS (IPSW'S) ARE AVAILABLE FROM THIS SITE:
http://www.felixbruns.de/iPod/firmware/

RecBoot:
http://jaxov.com/2010/05/recboot-iphone-recovery-mode/

TinyUmbrella:
http://thefirmwareumbrella.blogspot.com/

Sn0wbreeze:
http://ih8sn0w.com/index.php/welcome.snow

IP Adresses:
74.208.105.171 gs.apple.com
IF THAT DOESN'T WORK, TRY:
74.208.10.249 gs.apple.com

Courtesy :lizards821