What will recovey mode do to my iPhone?

Okay so I updated my phone to iOS 7 thing and I HATE it! Its like an android and no hate to androids they're great but I like iPhones better. So I heard that the only way to undo the update is to put my phone into recovey mode. But I don't really know what it will do. Will it delete everything? Like my pictures and songs? I mean I have over 2, 000 pics and a lot of songs I've bought from iTunes and id hate to lose that. Please tell me in detail what it does! And if you know for sure it will undo the update. Thank ya'll so much!

This all about Recovery mode: http://ipod.about.com/od/iphonetroubleshooting/a/Iphone-Recovery-Mode.htm

Once you update to IOS 7 there's no going back. Recovery mode wipes the phone clean back to a brand new state so it erases EVERYTHING on the phone. And that won't help you either since it uninstalls and re-installs the latest IOS 7 which is IOS 7.