@Johan123 What is the country version of the Deco M5 which you can find on the bottom label of the actual device, next to the model number. I checked the firmware release note, the 1.2.3 build...

@gazza_2please read the reply on this thread.

@PennyLane How many Deco do you have in total now? Have you ever tried to swap their locations to give it a go? What is the current firmware version? Is there any firmware available notification...

@PennyLane How do you connect the Sonos to the Deco M5? By wired cable or wireless? Have you received any update available notification on your Deco app? If so, you can update the firmware and...

@benoitc The Deco does not support advanced features, like antivirus/QoS/parental control and so on, you can click here to get more differences between AP mode and router mode.

@Gerben Hi Gerben, you can email our tech support to get this firmware. Please attach this thread link. https://www.tp-link.com/support/contact-technical-support/#E-mail-Support