I am on iOS 10.1.1 and have downloaded ipsw file for 10.2. While restoring to 10.2, I was getting error 3194. Now, I goggled out and then have added these lines at the end of hosts file on my windows xp desktop :- 126.96.36.199 gs.apple.com 127.0.0.1 gs.apple.com 188.8.131.52 gs.apple.com After adding these lines, am getting error 17. There is no connectivity issues at all. Can anyone please help me ? I am desperate to jailbreak my iphone 5s. Just to add, am on latest itunes and have already disabled firewall with a stable internet connectivity. Now, after several attempts, my handset is in DFU mode which is unable to start as normal. I am just being patient and not going to update to 10.2.1. Meanwhile, am helpless to use my ancient nokia C3.