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Free iPhone XR on T-Mobile when you trade in an iPhone X or earlier

Technically it's in the form of bill credits, but hey, it works out in the end.

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T-Mobile will give you a free iPhone XR when you trade in an old iPhone.

Angela Lang/CNET

On Wednesday, T-Mobile made it easier for you to get your hands on a new iPhone XR. The carrier launched a promotion that nets you the XR when you trade in an old iPhone.

The iPhone XR launched last year alongside the iPhone XS and XS Max. In his in-depth iPhone XR review, CNET's Scott Stein wrote, "The iPhone XR is the best iPhone for the price, delivering most of the advantages of the iPhone XS for hundreds less."

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But obviously a deal that sounds this good has some fine print. So here's what you need to know.

First, you don't get the phone for free. Instead you are compensated for $750 over the course of 36 months. That comes out to around $20.84 a month, each month from now until March 2022 or thereabouts.

Next, to be eligible for the free iPhone XR, you need to activate two new lines of service with T-Mobile.

And last, you have to trade in an eligible phone in good condition. Here are phones that will count toward the deal.

T-Mobile's deal will only last a limited time or until supply runs out.