iPhone VS iPod

Almost two years ago I bought me an iPod Touch to listen to my music. I only bought a 4GB because I didn't really see myself buying 4GB worth of music. But throughout its use I started to realize the iPod isn't just a music player; I was able to use Safari, get on Facebook, use Twitter and Youtube, and play dozens of apps off the app store. In other words, it's pretty nifty.

Well like I said, it's been almost 2 years. The battery is going bad and dies within 20 minutes of use. I've been planning on getting me a new iPod, but then I started to compare it to my cousin's iPhone.

Now I ain't exactly tech-savvy, but as far as I can tell the iPod and iPhone are one in the same. The iPhone surely has a bigger battery, better operating system, and can call/text/etc, but as far as general features and use goes they're pretty much the same. So I started to wonder "Why not just buy an iPhone instead?"

I was wondering if I could just buy me an iPhone and use it like an iPod. No, I don't want to hook up to no cellular plan, and I ain't gonna be using it to text or call folks. I'm just gonna charge it overnight, listen to my music, use Safari (I got WiFi at my house), and play my games and use my apps. I'm just gonna use it like I use my iPod. I figure the iPhone has better updates though, and not to mention better battery life, and it can run a lot more apps than my iPod ever could. Plus, if I ever want a phone, I'll already have one.

So is this possible?