Can i change my blackberry sim card into an iphone?

I have an blackberry with a contract with blackberry internet. Can i move my sim card into an iphone and still use the internet? Without extra cost.

No, you can't.
Blackberry sims are a different size to iphone.

Actually you can! Is it a micro sim card? Either way you can. Put a new sim into blackberry and transfer the data then snap off the sides to turn it into a micro sim and stick it into iphone. There are always ways round it. The phone shop should help you xx