Originally Posted by djice
As far as I am concerned if you have a data plan you're already paying for the service. BB messenger and Pin services are part of unlimited data plan, depending on the provider you are using. correct me "anyone" if I am wrong.
The OP is simply stating any SIM with a blackberry data plan active on the account. It doesn't have to be the OP's SIM. It could be your SIM. I take the OP's word that things worked the way he/she described, but I can't confirm or contradict that things will in fact work that way.
Swapping your SIM from one device you are using to another device you are using is one thing. But that's not what the OP is talking about.