T-Mobile’s got a new promotion, and if you want to take advantage, you’d better make some time in your schedule tomorrow.

On August 6, T-Mobile will run a buy one, get one free promotion on high-end Samsung smartphones. With this deal, you can buy one Samsung phone and get the second for free via 24 monthly bill credits. If you have to make a down payment on your second device, you’ll be credited for that, too.

To qualify for this promo, you’ll need to buy both phones on an Equipment Installment Plan (EIP). You’ll also need to get the second phone on a new line of service.

So which phones qualify? The Galaxy S7, Galaxy S7 edge, Galaxy S6, Galaxy S6 edge, Galaxy S6 edge+, and Galaxy Note 5 all qualify for this promotion. So no, the Galaxy Note 7 isn’t a part of the offer. The Samsung devices that are included are all pretty high-end, though, and the Galaxy S7 and S7 edge came out just five months ago, so they’re still fairly fresh.

Again, this promotion will only be available on August 6. You’ll be able to take advantage of it online and in stores.