I have a habit, for better or worse, of spending [possibly too much] time on Reddit. It’s so easy to get lost scrolling through articles and comments on just about every topic.

I’ve recently started to follow the r/Ubiquiti sub-reddit and this was something that I found there. Some people report having issues using Apple’s FaceTime over their UDM based Unifi environment, whereas others seems to have no such issues. So take this suggestion at face value and use it if you need it…

Open your UDM’s controller in your browser.

Navigate to: Settings -> Wi-Fi -> Wi-Fi Networks -> Edit each of your network(s).

Scroll down to 802.11 RATE AND BEACON CONTROLS.

Set each network to use these settings:

• Enable Override DTIM Period.
• Set DTIM 2G Period to 3.
• Set DTIM 5G Period to 3.
• Save your changes.
• Enable Auto Optimize Network.

Your iOS devices should now work and stay on 5G.