How can I get WI-FI on my Blackberry Bold without paying for a PDA plan with AT&T?

I used to have an HTC Fuze phone with Windows Mobile 6.I had to replace it through the warranty department with AT&T and I now have the Blackberry Bold.Now,according to AT&T, I cannot access WI-FI without a Blackberry PDA plan with AT&T! I thought WI-FI was free! Are there any free software programs I can download into my phone that will allow me to access WI-FI without paying for anything?Is there a way to access it without anything else.The Blackberry Bold is definately set up differently.Maybe I am just doing something wrong.Can anybody help me with this?Thank you.