How to fix error 3194, 1600, 1602, 1013, 1015, 20 on iDevice(Windows)降級iOS錯誤訊息

此方法適用在iPhone 4, 3GS, iPod touch 4G, 3G, iPad 2 (wifi) and iPad 1，不小心手殘升級了iOS到iOS 4.3.5而還有保留4.3.3以下的.shsh時，降級恢復到一半iTune跳出的錯誤訊息。

我自己是還沒手殘過啦…但是難保不會，所以來備份一下方法先…XD

IP Addresses used in host file:

• 74.208.105.171 gs.apple.com if it doesn't work, choose the second one
• 74.208.10.249 gs.apple.com

Required Downloads:

• Download any iOS firmware for any iOS device
• Download RecBoot for Windows
• Download RecBoot fro Mac
• Download TinyUmbrella for Windows
• Download TinyUmbrella for Mac
• Download Sn0wbreeze for Windows

from：GeoHot

Fix Error 3194, 1600, 1602, 1013, 1015, 20 When Downgrade from 4.3.5 to 4.3.3, 4.3.2 [Video]