The Wi-Fi Alliance itself certifies after making sure the Wi-Fi feature of a device has trouble-free connection due to software or driver bugs. The Galaxy A7 (2017) certified model is the AM-A720F model number, the global version with one SIM slot.
In addition to Galaxy A7 (2017), information summarized from Phone Arena, says that Galaxy A5 (2017) running Nougat also get Wi-Fi Alliance certification. Probably, Galaxy A5 (2017) will also get Nougat updates in the near future.
Some time ago, two previous models, namely Galaxy A7 (2016) and Galaxy A5 (2016) is known to have started getting Android 7.0 operating system updates.
The Android 7.0 update "Nougat" will add a number of new features such as split screen support to run two apps at once. There is also a quick reply feature to instantly reply to incoming messages without stopping the activity being performed.
Galaxy A7 and Galaxy A5 (2017) is a mid-range mobile duo from Samsung that has similar specifications, including Exynos 7880 processor, 3 GB RAM, 32 GB storage, 16 megapixel camera, and waterproof capabilities with IP 68 certification.