I backed up my 4s to itunes. Then, I plugged in my 6. It had the screen with the 3 options: new phone, restore from icloud, restore from backup. I pushed "restore from backup". It would not let me do that. It said that I had to id as a new phone and update to the latest version on the phone first. So, I did that, but now that screen never comes up. Not sure what to do.