@Friet Hi (sorry for the delay) i posted the MAC address already : 00-31-92-C8-5C-6C This comes from the black label and the tplinkdeco management interface (which i prefer above the app..I hate...

@ALEXANDRE A : Yes, Ethernet cable, and yes i see it in the router connection list B: i created a separate SSID, and connected to that SSID, hence connected to the S4 and not my existing wifi network...

Hello, Working to get three Deco S4 uits setup. first unit is setup finally and seems to work. - unit is set to access point , as the telecom providers modem router functonality cannot be switched...