If you use a BlackBerry on T-mobile’s network, you’re in luck! Now you can get free MMS messaging on the incoming and outgoing sides. The “BlackBerry Feature Enabler” service from T-mobile gives BlackBerry users the ability to send and recieve free MMS messages with a simple call to your T-mobile customer service representative (CSR) and asking them to turn the feature on. However, there is one caveat, you have to be signed up for a SMS text messaging plan to be eligible for the “BlackBerry Feature Enabler.” So, if all you’re using that BlackBerry data plan for is to send pictures to your friends, then get rid of that $20 data plan and ask your CSR to switch on the free MMS service (you’ll still have access to T-mobile’s T-Zones pseudo-web). The picture below should give you an idea as to what your myTmobile.com account should look like.
via: blackberryforums