If iOS 7 is downloading really, really slowly, or simply isn't installing for you, don't panic!
Chances are you've been temporarily inconvenienced by Apple ('s overwhelmed servers. )
Users all across the Internet -- including some irate members of CNNMoney's own staff -- have been receiving messages on their iPhone that the update was unable to download, or that the iPhone software update was simply unavailable.
This sounds pretty similar to issues that arise every year with each new major update of iOS. And if history is any indicator, it's a problem which will subside sooner than later.
What's likely happening is that there are more people simultaneously trying to hit up Apple's servers than those servers have the capacity for. And not only do you have to connect to download the software, but you have to connect again for the servers to verify that the hardware and software are legit before you can install iOS 7.
Combine the iOS update with the fact that every app developer is pushing out their iOS 7-ized updates (also delivered to you by Apple), and a perfect storm of server congestion starts brewing.