Question about a sim card for a blackberry phone?

You can change the handset on your account without any penalty, I think. Just go into one of the stores and have them attach the new SIM to your current account, and then whack the old one. I think you have to add a data service package, too, since the BB will need some sort of net access to do most of what it does.

The SIM card for the blackberry is the same size as the one you use in your phones. However, there’s no harm in just walking in to any T-Mobile retail store, give them your phone number and tell them you need a new sim card, just were given a blackberry and you want a new sim card for it, same number and you want to add the unlimited data plan for $20/month. They should have no problem doing it. You should NOT have to pay an activation fee either.