Originally Posted by mckinneycm
That's not going to change your data usage through the carrier. If your data plan is unlimited, why would you be worried about being charged??
Because some carriers offer unlimited data plan; but only when you use the Blackberry APN. They charge extra if you use the carrier's APN for instance when streaming or using some 3rd party applications
If you delete all the APN configuration you won't be charged extra but talk to your carrier to clarify this matter