I was on Blackberry International with ATT in 2006/2007. When the Nokia E61 came out, I swapped my SIM into it and configured it for Blackberry Connect. I remained on a Blackberry plan, not a Blackberry Connect plan.

My e-mail was not charged by ATT, but my browsing and other stuff was. I still remember the $600 bill from India which was reduced, but not cancelled.