Could I still use other features on my iphone if I deactivate its sim card?

I know that I could not be able to make calls, use the cellular network data or text, though I hear there are apps for that, but would I still be able to use the ipod features, browse through safari and the app store, as well as download apps and use them, while on a Wi-Fi network and take photos and videos even after deactivating its sim card? I'd just like to activate the one on my old phone but continue to use the iphone, I guess like an ipod touch, if you will.

Yes, you should be able to. Read through the link I've left you to get some more in-depth detail on this. I wouldn't want you to mess up your phone without knowing what you may be getting into.