The Galaxy S7 and S7 edge are more than three years old at this point, but surprisingly enough Samsung still plans to issue security updates for them from time to time. This is anything but the default scenario for Android smartphones - even Google only promises three years of updates for its Pixel line of handsets. While the good news is that the S7 and S7 edge should still get security patches from time to time, the bad news is that they've just been switched to that time frame from the one they were previously in, which meant they'd get such updates every three months. Samsung...
Source: https://www.gsmarena.com/samsung_galaxy_s7_and_s7_edge_arent_receiving_quarterly_security_updates_anymore-news-37728.php