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T-Mobile will sell you 2 Samsung Galaxy S7 phones for price of 1

The buy-one, get-one sale takes place this weekend.

T-Mobile is giving you the chance to buy one Samsung Galaxy S7 and get another one for free, but you have to act this weekend.

On Wednesday, T-Mobile announced its buy-one, get-one (BOGO) program, but as with most "free" promotions you'll have to mind the fine print. Starting Friday, November 11, at 6 a.m. PT, anyone who picks up a Galaxy S7 with T-Mobile's Equipment Installment Plan can get a second device for free after 24 monthly credits.

You do also have to add a qualifying line of service in order to get that second device. The promotion ends Sunday, November 13, at 11:59 p.m. PT.

T-Mobile has been quite aggressive with its giveaways lately. Recently, T-Mobile CEO John Legere promised over Twitter to send someone to Mars if he could get enough retweets. In addition to this S7 promotion, T-Mobile will dish out up to $650 for customers to pay off their bills and termination fees from other carriers and switch to T-Mobile. The company's recent growth signals that T-Mobile's tactics are working.