Where is the Option in the Cloud Control to turn off the 5Ghz Radio?

Question

We have a Problem with the 5Ghz Radio in combination with Samsung Galaxy  S6/S7. The Smartphones crashes many times a day when they connected with Rucks Wifi. We think, its a Problem with the MU-Mimo. Now we want to test it while we turn off the 5Ghz Radio. But i dont find the Option for that. Maybe someone can help me?

unknown · Answer

Problem solved. You have to Edit  the AP -> Click on Review  Radio Settings -> Customize settings for this AP -> Disable 5 Ghz.