How to get ios 7 on iphone 4s

I have an iphone 4s. Can i get ios7 on here? If so, how?

When you go to setting an update it should have the ios7 update, you need 2.9 GB in order to update your phone

You need to go to settings and push General. From there you should something that says Software Update and it'll show IOS7 update. You may have to use iCloud and back up all of your things, as well as delete somethings. Such as pictures or any downloaded movies. You should be able to just do it though.

First make sure you have 3.1 GB available. Then go to settings, click general, then software update. It should say iOS 7. Press download and install.