The certification document spotted on the website of the Wi-Fi Alliance only shows a few details, as usual. Based on the information it provides, we can only confirm that the upcoming Samsung Galaxy A8 Star will launch with Android 8.0 Oreo onboard and features dual-band WiFi support.
https://www.notebookcheck.net/Samsung-Galaxy-A8-Star-receives-its-WiFi-certification.303566.0.html