T-Mobile is evidently planning a huge sale in celebration of Valentine's day, offering all phones (plus the Springboard tablet and G-Slate) free for one day only this Saturday, February 11th. The deal will apply to current and new customers with Value or Classic Plans. Customers looking to take advantage of the sale will need to pay the 2-year subsidy, and will receive a full reimbursement via mail-in rebate card.
Update: The sale was apparently extended by an extra day through end of Sunday due to downed systems and busy stores that couldn't handle demand.
It sounds like those looking to pick up certain devices (including the Galaxy SII and HTC Amaze 4G) may need to have a 5GB data plan to be eligible for the sale.
According to TmoNews, marketing efforts are slated to begin as soon as today with an official announcement from T-Mobile and ads rolling out soon after. It's worth noting that with this deal, standard upgrade rules and migration fees will apply. If you want to get your hands on new Android-powered device for free, head over to your nearest T-Mobile retail store or authorized dealer this Saturday!