Data Connection Refused?

From BlackBerryFAQ

What is 'data connection refused'?'

• If you do not have a BlackBerry Data Plan then you will see this message on the main screen!

• If you have a data plan and are seeing this message then you will need to call your service provider and have them check the provisioning on the account.

• If you do not have a data plan and want to hide this message from showing up then go to:

Options >> Mobile Network and turn Data Services to OFF.