Some international versions of the Galaxy S7 and S7 Edge have been updated to official Nougat for a while now, and US carriers are finally beginning to jump on board. The T-Mobile version of the Galaxy S7 and S7 Edge received their updates yesterday, and now today AT&T is rolling out the update to Nougat. This is still Nougat 7.0 and not 7.1. It does include the February 1st security patch. Some features include quick settings, new multi-window implementation, and some UI enhancements. Head to Settings, and check for updates to force the update.