T-Mobile and MLB have a marketing relationship that spans back several seasons. Since the beginning of that relationship, T-Mobile subscribers have received a free yearly subscription to MLB.TV At Bat – a paid mobile service that lets users listen to game broadcasts, follow live stats, and watch highlight replays. Normally $20 a season, it was a nice gift that baseball lovin' T-Mobile customers (myself included) appreciated.

This year, the gift for T-Mobile users is way better. From April 3rd through the 10th, customers can sign up for a free subscription of MLB.TV Premium, which is MLB's full-blown video streaming service. With a subscription, T-Mobile customers can watch every out-of-market baseball game (and in-market games as well for a few select teams) this season. The service costs $110 through MLB.TV directly, so it's a pretty nice treat for John Legere's clients.

Now for the details. To be eligible you must be a T-Mobile customer (obviously). The splash page does not specify that you must be a postpaid subscriber, so I think pre-paid customers may be eligible for the offer as well. Once you have signed up for the promotion from a T-Mobile device, you are free to use the service on any other compatible platform. The subscription also includes a full season's access to MLB.TV At Bat. We'll update the article with specific instructions on how to sign up once the promotion goes live.