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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.

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.