What is iOS 7? How can I get it on my iPhone 4?

What is iOS 7? How can I get it on my iPhone 4?

Added (1). When is it coming out? I didn't even know it wasn't released yet. I heard so many people talking about it today.

IOS 7 is apple's next iOS system update. You can get it on your phone when they release it

IOS7 is not out yet, and it may not be installable on all old iphones.

So wait till it comes out.

IOS 7 is the new version of the iPod/iPad/iPhone software that is coming out for the aforementioned devices this fall.

How you would get it is to either let the device update itself (by being plugged into a charger and connected to a Wi-Fi source) or to let it get the update from iTunes when it's hooked up to your computer.

You can't legally get it beforehand unless you're a Developer for Apple Apps and pay the $99 fee for the developer's release of the software (for testing purposes). Any place that offers it as a download is an illegal source that is either the normal release (in which you can't use it without a valid developer's code) or is hacked and can potentially brick a iOS device.

Brick as in "turn your iOS device into something with the functionality of a brick"

And yes, while the iPhone 3GS is poop-outta-luck for getting iOS 7, the iPhone 4, 4S and 5 can get it.