This Iphone Could not be restore 3504

Hi, i have the same issue (i got iTunes error 3504).

I've done the following:

go to C:\Windows\System32\drivers\etc

double click hosts then comment all gs.apple.com lines (in my case # 127.0.0.1 gs.apple.com)

then save the file hosts then restore.

hope this helps you.

Are you sure it wasn't 3004?

If you see Error 3194, Error 17, or 'This device isn't eligible for the requested build' in iTunes - Apple Support