I have Deco S7 and i removed Fast Roaming and Beamforming and it keeps disconnecting my phone and other phones as well i tested with android device and iOS device and issues is the same . The moment it connects it diconnects and nothing issue is fix for 30 min after reboot and the same occurs again. The 2.4 and 5ghz are beaming at the same time not separate but for 1 year i didn't have an issues after the last few days it started as an issue. Does any one have an idea ?