Upgraded to iOS 7 "Could not activate phone" I have an iPhone 4S and I just upgraded to iOS7 through itunes, but with an "unknown error". I restored it and now it's saying it can't activate the phone. 

Similar to this question here: iOS 7 activation problem

The difference is that I'm not getting any service-related issues. I have service/a wi-fi network, but the error I see is "Could not activate phone: Your iPhone could not be activated because the activation server is temporarily unavailable..." etc.

I've tried over wi-fi, through iTunes, and over cellular connection. I've restarted/restored my phone several times. Any other ideas? 

The reason I'm asking is that almost all the threads I find through googling make these assumptions:


Some people use a copy-pasted assumption that "99.9% of the time this is because your phone has been jailbroken / hacked to use a different carrier etc." but I don't even know how to jailbreak a phone. 
It assumes it is Sept. 18 when the update first came out, so the servers were overwhelmed. I would hope this would no longer be the case after almost a week. 
It assumes that I'm a developer trying to use a beta, which I'm not.


This thread https://discussions.apple.com/thread/5318775?start=0&amp;tstart=0 seems to indicate that I just keep having to try over the course of several hours/days until it gets through, so I will keep trying until I get a clear alternative.
As I posted elsewhere, after reading a million hints and trying everything, a guy said: Try a different computer. Even a friend's. 

Went right through. Honest, it did.