IPhone 4S: Top 5 Things to Know About Smartphone With iOS 5

Steve Jobs would be proud. The iPhone 4S -- announced the day before he died -- is hitting stores today and being shipped to those who ordered it online.

And to go with it, Apple has introduced iOS 5 -- its new operating system -- so successfully that it was almost too successful. The Internet seemed to buckle under the load as people tried to download the software into their existing iPhones, iPads and iPods.

Here are five things that will be helpful to know if you're an Apple enthusiast, unpacking your new phone or waiting for it to come. We hope this information will be useful, too, if you're sticking with the competition.