Hi Mikaeil
Please create a Test SSID [open Authentication 5Ghz band]
Apply the above to one AccessPoint
On one Samsung Device,please install the below Google play store app
https://play.google.com/store/apps/details?id=org.wahtod.wififixer
Check if the devices is able to connect.
As you could see the Android APP on the mobile would show the association,ip assignment etc.
You could also send logs to your email address.
Please do this for open authentication,since you have specified the samsung does not connect to any ssid.
Then you could repeat the same for production SSID [open and 802,1x]
Send log in the app send a text file to your email. Please use send log every time you connect to a different SSID.
Please share your findings.
Regards
Rajesh