Using my old 8330 just to talk/text

I've had the Curve 8330 for two years.  I just upgraded my teenager from a basic phone and "gave" him my data plan because I just didn't use it enough.


The problem is this.  I really like the Curve for texting and talking.  Is there any way I can keep it and just use it that way without the data plan?  I have fulfilled my contract.  Why should I have to give up the phone if I want to keep it just without the data plan?