@Pilske To better upderstand what you have, please also share these two screenshots from your Deco app:

@MassivePenguin For this Deco model and its hardware version the only way to enable Select Source feature is to install beta 1.7 firmware version, which is discussed at this forum topic: Deco...

@Andeh1 Connect one of Satellite Deco directly to Main Deco with Ethernet cable, see if it can get Ethernet backhaul. Router --> Main Deco--> Satellite Deco If it does, it is possible switch that you...

@RishiDS 650Mbps is what you should be getting from M9 Plus. I am starting to suspect Ethernet cables. Ethernet standard is gigabit, followed by 100Mbps. If you are getting speeds close to 100Mbps,...

@RishiDS With Ethernet backhaul, you should be getting same speeds from Satellite Deco as you are getting from Main Deco. If you power off all Satellite Deco and run speed test on iPhone 16 standing...

@Cornishman I am afraid you did not read carefully the forum topic I provided. The problem is between Main Deco and Vimin 16 port PoE siwtch. The wired link between them is broken. All symptoms point...