There has been quite a bit of movement recently as far as T-Mobile’s plans are concerned and if you haven’t been keeping your eye on the ball, you probably missed something. For the most part, T-Mo has added plans and options that are pretty favorable for subscribers but word just came in from one of our ninjas regarding a few more upcoming changes some might not be happy about. The first concerns smartphone users: We know that all you BGR fans out there obviously have data plans but there are plenty of people who enjoy the enhanced functionality of a smartphone who haven’t yet embraced mobile data services. Unfortunately, those people are in for a bit of a disappointment — some time in June T-Mobile will begin requiring that all smartphones (new activations / upgrades) have a data plan. This new requirement will not apply to the BlackBerry Pearl, BlackBerry Pearl Flip, Samsung Behold or Samsung Memoir. Next up, messaging addicts: Also beginning some time in June, T-Mobile’s Unlimited Domestic Messages for Families will jump from $19.95 per month to $24.99 per month. It’s still a pretty sweet deal of course, just not quite as sweet as it used to be.