Some OEMs thrive on selling unlocked phones, but Samsung has always been very chummy with carriers as a way to move its phones in the US. That has traditionally meant unlocked versions of the Galaxy phones on sale in the US were actually imported international models. Today, Samsung is announcing an unlocked version of the Galaxy S7 and Galaxy S7 Edge for the US, and it'll work on virtually all carriers.
Samsung was a little light on actual specs in the PR, but we do know the US unlocked GS7 will support both GSM and CDMA-based networks. So, this one device will work on Verizon just as well as it works on T-Mobile. Presumably, this phone will have a Snapdragon 820 like all the other US variants rather than the Exynos used in international markets.
The unlocked GS7 and GS7 Edge in the US will cost $669.99 and $769.99, respectively. They will be sold by Samsung directly, as well as various retailers including Best Buy, Amazon, and Target. The listings don't appear to be live yet, but that's supposed to happen today.