When I have Bluetooth on and connected to my headset the highest speed I can attain on 2.4Ghz WiFi is about 10-20mb vs 80mb+ when I turn off Bluetooth. This is a major issue for me since this is s brand new flagship Note Ultra 20. I get 275mb+ on 5Ghz. 2.4Ghz is more common when mobile. On my older router that did not Support AC 70mb+ every time on 2.4Ghz. CONFIRMED I just tried my wife's Note Ultra 20 same exact problem. Router is ASUS RT-AC5300.