If you have a North American device, well, uh... If you're lucky enough not to update for a while, you can check out [this paid service][Paid North American Unlock]. (At your own risk). Any phones prior to the S23 with an Exynos SoC can be unlocked if not carrier locked, regardless of region.
Snapdragon phones prior to the S7/Note7 (2016) can be unlocked regardless of region, as long as it's not locked to a carrier like AT&T or Verizon. The Canadian S7 can also be unlocked as it uses an Exynos SoC, despite Canada normally being a Snapdragon region.
Be aware that unlocking a Samsung device will permanently trip Knox. As a result, many Knox-based features will be broken. This includes, but not limited to: Samsung Pay, Pass, Flow, Health, Secure Folder, Secure Wi-Fi, Smart View. Can you be denied warranty? Probably...
Additional info provided by [aries-ts-indo](https://github.com/aries-ts-indo) and [Ivy / Lost-Entrepreneur439](https://github.com/Lost-Entrepreneur439).<br/>
