Ok, I am at my wits end! Been trying for hours to figure out why I keep getting the dreaded Unknown Error 3000 while trying to install Beta 4 on my iPhone 5 through iTunes. There are not a lot of reasons to get an error in the 3000 range, but mostly it is because gs.apple.com, can't be reached. Problem is that I was able to restore to 6.1.4 twice, with no problem so I know I can "see" the update servers. FYI: My UDID is registered to my account. I can restore to 6.1.4. I've tried multiple USB ports. I've tried multiple USB cables. Anyone have ANY input here would be greatly appreciated!! Thanks in advance everyone!