done everything suggested so far. don't want to switch sim cards as i've inputted the new sim on the att activation page. have had no service on my 6 for well over 2.5 hrs
Same here, started process at 10am when I got it, everything appeared OK, but can't make or receive calls, or access voicemail.
Going on 5 hours now.
I would try to get ahold of AT&T perhaps. The Mrs. just activated hers and it took under a minute.