Will my T-mobile sim card work in a cingular blackberry?

I have the T-mobile tap, but I am getting a Cingular blackberry, will my sim card work in it?

HI no your t-mobile sim wont work in Blackberry mobile locked with cingular until you unlock it ....You can easily unlock your Blackberry mobile using sites like UnBBlock.com here they are rendering unlock code for all blackberry mobile models at reliable cost .....After unlocking your mobile you can freely use it with any GSM sim.....