So you might try changing the power output of the 5Ghz radio to 25%. Then connect your mobile device at a distance from the RBR to ensure the mobile phone keeps connected to the 2.4Ghz radio. After you get the IoT device connected, re-configure the system back to where it was. Under Advanced Tab/Advanced Settings/Wireless Settings
Contact the mfr of these device for additional help, support and infornation regarding there product
