Blackberry Apps Free Downloads

I have to pay to download free applications from the App World of BlackBerry with my data plan?
I just got a BB curve and $ 29.99 per month data plan from Verizon. I download free applications (including the application of Pandora 400 kb) when I saw a notice saying that I should consider / make sure I have the unlimited data plan that costs could increase rapidly w / o it. I had the same opinion when I tried to go on Youtube, so I closed. I uninstalled Pandora, and my use of time, I had downloaded only. I have to pay to download, even if not used?
If the applications are free, must not charge for the download, then delete them. However, AT & T may consider downloading in itself a use of your data plan, and if your plan does not cover 400 KB download, is likely to be charged for that (data) and not the application itself.
Download free apps for blackberry