Over the weekend Samsung brought us one of the best Samsung Galaxy S21 deals we've ever seen, and now it's extended to run through today (March 29) as well.

Until the end of that date, Samsung is selling its unlocked Galaxy S21 phones from $99.99 with a trade-in. This is one of the best Galaxy S21 deals we've seen this month. (Note that the amount of trade-in credit depends on the phone you trade in, with newer fans commanding the biggest return.) Plus, you'll get up to $100 in Samsung credits that can be used toward add-ons on any phone purchase.

In our Samsung Galaxy S21 Plus review, we found that the phone offers a great display, a powerful camera, and an overall polished smartphone experience. On the hardware side, the phone features a 6.7-inch (2400 x 1080) display, Snapdragon 888 CPU, 8GB of RAM, and 128GB of storage. Rear cameras are 12MP wide (f/1.8), 12MP ultra-wide (f/2.2), and 64MP telephoto (f/2.0) with 3x hybrid zoom / 30x digital. There is also a 10MP front camera, which supports 24fps 8K video recording.

In our tests, we found the S21 Plus' display to be suitable for watching movies, viewing Instagram photos, and playing games. Photos, on the other hand, are a stunning upgrade over the previous model's photo capabilities, with vivid colors and detail. In our battery test, the S21 outperformed the S21 by 9 hours and 41 minutes, but fell short of the S21 Ultra's 11:25.

Samsung's current sale applies to any S21 Plus phone, but act quickly since it ends Sunday end of day.