The Dark Knight Rises coverYour carrier needs you. T-Mobile on Tuesday announced an exclusive deal that will offer a special edition Dark Knight Xpress-On cover for customers who purchase a Nokia Lumia 710 between June 20 and July 31. Now you can fight crime and dawn the Batman symbol around any city across the globe. Making this deal even sweeter is the fact that the Lumia 710 is currently being offered for free after $50 mail-in-rebate and with a two-year agreement.

Existing 710 owners can stop by any T-Mobile store and nab the cover for free, too, which is available in cyan, magenta (hah), yellow, black or white. In addition, one lucky tweeter will be sent to the U.S. World Premiere of Christopher Nolan's The Dark Knight Rises in NYC on July 16. To enter, simply use the hashtag #Lumia710NYC starting Wednesday, June 20.

Nokia previously unveiled a special Batman Edition of the Lumia 800 and 900, along with an exclusive Dark Knight Rises app, which offers a countdown clock, Foursquare support, streaming content and more.