Samsung Galaxy S7 and S7 Edge owners on T-Mobile have recently begun to receive OTA notifications that the Nougat update is ready and it looks like the latest security patches have been included as well, although the new firmware is not based on Android 7.1.1.
http://www.notebookcheck.net/Samsung-Galaxy-S7-Edge-gets-Nougat-on-T-Mobile.197926.0.html