Use an iphone as an ipod?

Ok so I'm really into taking pictures and photography and I have a Nikon Nikkor 15x wide Optional zoom VR but when I'm out at school and places I don't bring it with me. I have an Ipod 4 gen, and the quality of iPhone pictures is much better than my iPod pictures for when I'm out somewhere. Would I be able to buy and iPhone with no plan and still use the Camera, and all the apps it comes with? Also could I have my apps and music on there and use Wi-Fi so it's just like an iPod, but really an iPhone?

You only get ipod on an iphone 5

You could just get an iphone that isn't activated.yes it will have all the same apps as ipod