They say:

…T-Mobile is planning a Valentine’s Day sale… Unfortunately, we don’t have any details to go on — but smart money would have us believe any sale would likely be focused on Value Plan offerings… T-Mobile is planning for a “blackout” period for the last two weeks of March and first two weeks of April. Why? All signs continue to point to a possible iPhone launch as well as a transition into a Value Plan only environment…

TmoNews

We Say: Worst case scenario they give us a bunch of discounted handsets and help usher in the full switch over to the rate plans.