IOS 7 won't verify and says try later. Why is this?

I'm downloading iOS 7 for an iPhone 4s but am wondering what I should do when it says verifying and then says try again later. Why won't it verify just yet? I've heard it's very popular but can someone tell me why this is happening?

I'm having the same problem with an iPhone 5. I'm wondering if the server is too congested.

I'm having the same issue, I'm assuming it's because everyone is trying to update at once.

This is a problem I'm facing. It's most likely due to the fact millions of people are all doing the very same thing. This effect will have a DDOS effect on the apple servers. If your at the verify stage your lucky you've not hit the unable to download error. Keep at it, wait until the morning either way you'll get it sorted soon.

So glad I'm not the only one having this issue! Anyone get past it yet?

I had the same problem. It is finally working. Click Install Now, agree to the terms, it will say it dodnt work… Exit settings… And do it all over again. It took me about 5 or 6 times… But it worked. Hope this helps ya'll.

Just got past this after 3hours trying

Server is busy!
Try and try!

Apple's servers are being slammed by millions upon millions of updates. Just be patient.

Go to all of the polices and scroll down on each one and then try again it worked for me