ITunes can't update brand new iPhone 6 to iOS 8 1.1.

Question

Hello!
I had an iPhone 5 with iOS 8.1 installed and I just bought an iPhone 6+. I wanted to configure the 6+ using 5's backup but I got a message saying it couldn't be done because the the OS in 6+ was "too old" and asked me if I wanted to update it. I clicked on update and the problems began...
1) iTunes downloaded the new iOS version and automatically started updating my iPhone 6+ but it couldn't complete the process
2) I got a pop up window saying that my phone couldn't be updated and that it needed to be restored to its factory settings. Since the phone was empty (because it's new) I click on "restore and upgrade"
* The only options I got were "Restore and upgrade" or "cancel"
3) iTunes started "extracting software" and then installing it into the iPhone. It got the "verifying with Apple" and then the "Waiting for Apple" messages in the iTunes screen.
On the phone I got the Apple logo with the progress bar (empty)
4) I got a pop up window with the "your phone couldn't be restored - Error 6" message.
5) When I clicked OK, iTunes automatically ejected the phone (it disappeared from the upper bar) but the phone itself got stuck in the Apple logo WITH THE PROGRESS BAR (empty).
6) When I unplugged the phone from the computer I got the "connect to iTunes" screen and it got stuck there.
7) If I close iTunes and plug the phone again, I get the "restore and upgrade" message again but it fails at the same point.
This is what I've done so far trying to solve the problem:
a) I did the "restore and update" process at least 5 times (I lost count) without success.
b) I rebooted my computer and changed the USB cable to different ports.
c) I tried the whole "connect to iTunes, press and hold the Power button and the Home button at the same time, etc" tip but it didn't work.
NOTE: I have the latest version of iTunes and I'm connecting the USB cable directly to the computer, I'm not using a hub
I'm at my wit's end and I would really appreciate any advice '( you could give me. It's so frustrating to have a new phone and not being able to use it!
Thanks in advance for your help

Answer 1

Hello again!
I just wanted to update this thread in case someone has the same problem.
I checked the firewall and antivirus and they weren't the ones causing the problems. The IT guy at my office checked the phone for me. Since he is the one who updates, fix, prepare the iPads used by some employees of the company, he has all the privileges in the system to download/update iTunes and iOS but he couldn't fix it either.
Then I took the phone to the authorized technical service and they couldn't fix it either. So I had to go back to my phone company and they had to give me a new phone. I was the unlucky person that got the defective iPhone But at least I was lucky enough to get a replacement immediately before they sold out.