The new year is almost upon us, and that means that the annual cycle of folks making resolutions to get in shape is almost upon us. And T-Mobile wants to help, with some deals on the Apple Watch and Galaxy Watch that might help you actually keep those goals.

The deals go live on January 2nd, and aren’t too shabby: for the Apple Watch, if you buy either Apple’s latest Series 4 model or last year’s Series 3, T-Mobile will give you a $200 discount on the second one. And fans of Samsung’s platform have an even better deal: buy one Samsung Galaxy Watch, and T-Mobile will give you the second one for free.

As always, there’s a catch for both deals: you’ll need to sign up for a T-Mobile plan for both your full price and discounted LTE watch, and one of those has to be a new line. It’s not quite as onerous as the phone deals that need you to sign up for a full new line of cell phone service, but it’s something to keep in mind.