One hundred days and several hundred bug fixes after its announcement, iOS 7 is now available to download for iPhone 4 and later, iPad 2 and later, and the fifth-generation iPod touch. Apple claims there are "over 200" new features in its new OS, and by now you've probably heard all about the big changes. If you read our iOS 7 review, you can also find out whether they've combined to make iOS a better operating system. But what about the little things? The little things are important.

We've all been there: you've been using a device for months and suddenly you discover something that you never knew existed. “Oh that’s what that button does.” No matter how simple our devices pretend to be, underneath the gloss and marketing lies an extremely complicated machine. Have you ever looked through every settings menu on your phone? Probably not, but we have. This guide will give you help you discover new settings, organize your iPhone, and show you some of the hidden features in iOS 7.

Roll over each iPhone to see what's new.