On the blackberry mail and minutes plans, it says next to "none" next to hotspot.

This is defined, on their site,

"HotSpot
With T-Mobile HotSpot service, you get blazing-fast Wi-Fi Internet access using your Wi-Fi-enabled device, such as a laptop, smartphone, or wireless Internet card at thousands of T-Mobile HotSpot locations nationwide: coffeehouses, bookstores, airports, hotels, and more."

Now, I have unlimited data. Does this mean, even if I have unlimited date, I will get charged extra for using WiFi if it says "none" on my plan description?

Does anyone have experience with this?

Thanks!

No, you don't get charged at Hotspots.

Thanks for the quick reply!