The Galaxy J7 (2016) just started to receive the Android security patch for the month of April in India. The OTA package is quite slim at only 25.78MB and has the build number MMB29K.J710FXXU3AQD4. Along with the 49 CVE (Common Vulnerabilities and Exposures) fixes included in all Android SMR releases for the month of April, Samsung also includes 16 of its own fixes that are unique to the manufacturer's smartphones only. If you own a J7 (2016) in India, you should be prompted for the update anytime now.
The S7 and the S7 Edge has also started to receive the same Android SMR update but this report is apparently coming in from Europe instead of Asia. The OTA update includes the same fixes from Google and Samsung as the ones mentioned above. It might be a while though before you get to see the update pop up on your phone. How much you will need to wait will depend largely on your location.
Head over to our firmware section to find all the latest available updates for your Samsung smartphones.