@Dan1987 In Deco world, manual configuration of how Deco units should connect to each other is called signal source selection. That feature is described here: How to select a preferred signal source...

@Richardspain Please check what is the hardware version of your Deco M4. You should be able to configure how they connect to each other, if both M4 are hardware V4. The process to configure described...

@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...