iPhone Cannot upgrade to 5.1.1

[hlong290494]

Hello, I'm using iPhone 3GS with iOS 5.0.1

Now I want to update it to 5.1.1 but iTunes reported an error 3194.

Through google search, I found out that the host file got some problem.
I did clean the host file to blank. Tried to restore but the problem couldn't be solved.

Any ideas?

I don't want to go to 6

 

[Ashwood11]

https://forums.macrumors.com/threads/1454168/