Engadget Mobile is reporting that T-Mobile has the ability to give free MMS messages to its BlackBerry users that are subscribing to an SMS plan but do not use email and other data features. We're not sure who fits into this category but if you do, engadget suggests calling T-Mobile and requesting that the "BlackBerry Feature Enabler" be added to your account while you take off the $20 BlackBerry data plan.
"There are reports that T-Mobile can turn the switch on a "BlackBerry Feature Enabler" which allows its BlackBerry customers to send and receive MMS messages for free if an SMS plan is subscribed to."
