I have a Blackberry Curve 8330.  When my device loses connectivity (e.g., in the subway), the data connection is very slow (3-10+ minutes) to reactivate once I have a signal again.  The voice connection works nearly immediately.

I have tried to turn off and on the connection, but that does not always resolve the problem.

What's the normal/typical lag time for the data connection to work again?

Thanks.