Did this-- Its says its already activated and is ready to go. My problem is same as " Grapho" above.
Sim card is activated - my old sim card is deactivated. If I put the iphone 6 sim in my iPhone 5 s it could mess up getting activated by Apple I was told.
I just switched my sim card back. Just in case. I called Apple today. Spoke to new tech, still no resolution. Waiting on elusive engineers to address issue. At this point I think it's a lot of folks that are in the same boat. This will take some time to fix from Apple.