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The Samsung Galaxy Watch 8 is a great Android-based smartwatch that blends health and fitness features with smartphone connectivity. And right now at T-Mobile, you can get one for free when you add a new Watch Plan Plus line to your mobile plan. Prefer iOS? Apple users can save $300 on the Apple Watch Series 11 with a new Watch Plan Plus line. 

Also: Samsung Galaxy Watch 8 review

As is usually the case with these "free" device deals through a mobile carrier, there is a stipulation: You'll pay for the watch up front, but get paid back the $400 price over 24 months in bill credits when you add a line on an eligible Watch Plus Plan. You'll also need to pay a $35 device connection charge. 

The Samsung Galaxy Watch 8 features a 40mm sapphire crystal face for exceptional clarity and durability, while the 1.34-inch display gives you cleaner text and icons. The updated battery gives you almost three hours of talk and text time, but you can get about three days of use in Standby mode. 

Also: Apple Watch Series 11 review 

Samsung also integrated its personal AI assistant into the watch for custom search and media options, drafting texts, or taking quick voice notes. You'll also get in-depth health and fitness tracking with full sleep reports, workout logs, and sport-specific training guides to help you reach your goals. With 32GB of onboard storage, you'll have plenty of space for your favorite apps, and support for gesture inputs give you full hands-free control over your smartwatch for better multitasking while working out or going about your workday.

To take advantage of this deal, new and existing T-Mobile customers have to add a new Watch Plan Plus line to their mobile plan. The T-Mobile website will automatically apply the discount for your Galaxy Watch 8 or Apple Watch Series 11 when you add it to your cart and update your plan.

How I rated this deal 

Getting a free Galaxy Watch 8 with your mobile plan is a pretty sweet deal, as is the $300 discount on the Apple Watch 11 for iOS users. Both offer more ways to stay in touch with family and friends when your phone isn't nearby as well as tons of health tracking features like sleep tracking and heart monitoring. That's why I gave this deal a 5/5 Editor's rating.