@IanSutcliffe Have you considered the possibility that your master bedroom Deco unit may be defective, with broken internal antennas, and not properly broadcasting WiFi signal? I have Deco M5 at my...

@pcouchman It is possible that when Satellite Deco are powered on, the device you run speed tests on is connected to Satellite P9. That was the reason I suggested to power off Satellite P9s: to make...

@Ishamael_cr You can configure Guest Network to provide WiFi 2.4 GHz band only. If you run Deco mesh in Access Point mode, enable "Allow Local Access" in Guest Network settings so that devices on...

@Jens_Jespersen This feature is called client's connection preference, described here: How to select a preferred signal source on the Deco App This feature will be enabled in firmware 1.6 for Deco M9...

@pcouchman You got it a bit backward: in Router mode Deco will restrict bandwidth using QoS parameter. In Access Point mode QoS is disabled, Deco will always provide maximum bandwidth it is capable...

@Adam1V I briefly glanced at YouTube video: a guy with so much networking gear should know better than expect "everything just works" and complain when it does not. The switch he uses is from DLink,...