Why can't I update my iPhone 4 to iOS 7?

So the update for iOS 7 recently came out… And whenever I try to update my device it says an error occurred downloading iOS 7.0. WHY?!

Because you have 50, 000.000+ people all trying to update at the same time. I don't think even Apple's servers could handle the strain.

Mine is like this as well. I've contacted Apple through their online chat system, and they told me it's because many people are trying to download right now. The servers could be crashing, or your Wi-Fi connection may not be that strong. Either way, you'll have to wait until later on in the day if the problem keeps occurring.