AT&T has started sending out an update containing the May security patch for the Galaxy S7 and the S7 edge. Although we're already 12 days into May, it's good to see that the carrier hasn't forgotten to issue the patch, even though it is yet to officially detail the new update on its website. It seems like this is merely a security update so there won't be any new features on board.
Devices like the Galaxy Note 4 and Galaxy Note 5 (unlocked) have seen the May security patch already. If the update hasn't reached your device yet, head over to the Settings » About device page to try pulling it manually. Have you seen the update on your AT&T Galaxy S7 or the S7 edge? Make sure you let us know in the comments below.