https://www.cnet.com/news/iphone-se-is-again-available-from-apple-for-249-april-13/

While the phones listed come prepackaged with carrier SIMs, all of them are unlocked and should work with any US carrier.

Originally launched in March 2016, Apple's iPhone SE served as the smaller, more pocketable member of the iPhone family. It was Apple's compact, budget option, and its 4-inch screen and tinier overall size were total throwback stuff. Consumers loved the battery life and that it still had a headphone jack -- an option Apple started killing off starting with the iPhone 7 in 2016.