Well it looks like that earlier leak of a T-Mobile Samsung device sale was spot on. For two days this weekend -- November 16th and 17th -- T-Mobile stores will be selling just about every Samsung device they offer for $0 on contract. In typical T-Mobile fashion, the savings come in the form of a mail-in rebate. So if you're looking to pick up a Samsung Galaxy SIII (S3) on a Classic Plan, you'll have to plop down the full $299 and wait for that rebate in the mail.
The biggest omission here is the Galaxy Note 2, which makes sense considering that it has just launched and T-Mobile's on-contract price is very expensive. They may not be willing to subsidize it this much quite yet. Regardless, a Galaxy S3 for $0 on-contract sounds like a great deal if you're in the market for one.
Source: T-Mobile Newsroom