"Starting this Friday (Feb. 21), we’re offering $200 credit toward a new device when you trade in your current BlackBerry and upgrade to one of the latest, greatest devices. Purchase any device we offer at T-Mobile. It’s that simple. Bring in your old, working BlackBerry and we’ll give you $200 toward a new BlackBerry or any of our other state-of-the-art smartphones.i In addition, for those existing T-Mobile BlackBerry customers trading-in and choosing a new BlackBerry Q10 or Z10, we're offering an ADDITIONAL $50 off the purchase price of that new BlackBerry. These offers will be available for a limited time."
http://support.t-mobile.com/thread/65077
http://support.t-mobile.com/thread/65183
http://multimediacapsule.thomsonone.com/t-mobileusa/blog_un-carrier-plus-blackberry
After I read your guys' post, I did little research my own. I did trade in on March 3rd, all of my five lines of Blackberrys and I ordered 5 phones per each of my lines in the same day. It has been 3 month, i have gotta 2 out of 5. The other three, they only offered $10 each for Blackberry. however I called in since this Monday, the T-mobile representatives seem not knowledge with this offer. They told me the offer was starting at April..........(ps: everyone i talked not admit this offer, they told me call me back. All BS. No one was calling me back. I gotta work everyday, I can not waste my time on call in with unreasonable excuses.)