Your reply link is on how to restore an iPod. This is regarding an issue with an iPhone and as such I consider the response not very helpful. Without explicit instructions I do not consider the issue resolvable as of yet. I've seen too many "shooting in the dark" responses on the Communities forum to just start in trying anything without being able to document the break-fix process. (Hope you aren't offended! )
Here's a further update to the issue which might help..
When I enable iMessage and Facetime it sends an SMS message to 44 753 741 0297
and 44 753 741 0227 and 44 753 741 0247and 44 753 741 0287
Those are telephone numbers in Ireland !!!!.
I can only assume that as I have to enter an international dialing code when I text
overseas, the activation process is being inhibited!
WAY TO GO APPLE!!!!
(I guess we can blame it on outsourcing!!!)
I would suggest first that if anyone has an Activation issue, they should first check their call history for their cell phone provider and see if you have any calls overseas. If your plan blocks overseas calling, iMessage and FaceTime will probably never activate!