I phone 4 restore, COULD NOT ACTIVATE IPHONE?

I have an AT&T i phone 4. I went to download IOS 7 and it said i need to clear up space in order to downlaod it. However, my phone only had 5 pictures about 50 songs and one app? So i researched it and found out that i have corrupt data on my phone that its taking up space and you have to restore it to factory settings in order to get that data. So now its telling me that
"Your iphone could not be activated because the activation server can't be reached. Try connecting your iphone to itunes to activate it, or try again in a few minutes".

- Tried connection to itunes get a similiar error.
- Can't access my phone and says no service in upper left hand corner

Same problem here. This happened when iOS 6 was released. I will admit this one is taking a bit longer. The servers are being bombarded. Individuals from all parts of the world are attempting to activate their iOS 7 software. I suggest trying at 20 minute intervals.

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