Using ICloud to backup iPhone 3G?

I have one of the oldest iPhones 3G (still works) I want to upgrade to an iPhone 5S finally, and I was reading ICloud and it said something about needing an IOS 5 or greater to even use it. Can I backup everything currently in my old iPhone 3G? I don't have much, just want to be able to keep texts, pictures, a few videos, and notes. If ICloud won't work for me, any other options? Any info on this would be greatly appreciated.

ICloud requires iOS 5 or later on iPhone 3GS or later. To use iCloud on iPhone 3G, you need to manually set it up. You can refer to this article: http://www.adeepbite.com/sync-contacts-to-iphone-3g-from-icloud/