Sprint just launched a new promotion that’s a very good deal but also seems like the ultimate Hail Mary throw of desperation. The company is offering an entire year of free service — including unlimited data, talk, and text — to customers who switch to the carrier and bring over an eligible phone. Current postpaid subscribers at Verizon, AT&T, and T-Mobile are eligible for the deal, and it also covers family plans. Here’s the page that explains the offer, and I’m not really seeing any alarming fine print or gotchas. There’s no contract involved. You’ve got to pay a $30 activation fee up front, but that gets refunded within two billing cycles. Also, this is only for new Sprint customers.

But so long as you sign up sometime before June…

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