@dsakd Hi, If the FritzBox have WIFI function and you connect the main Deco to the FritzBox, then please set up internet connection type as dynamic IP. You can also call TP-Link local support to help...

@retired_user Hi, If the light is still blinking blue, and you can still see the Deco default WIFI, then it means the satellite Deco is not set up yet. Please try to manually add the other Deco XE75...

@AndyChamps Hi, Please make sure that the APP is the latest version. And please connect to the Deco WIFI and test again. Besides, you can also go to www.speedtest.net or the Speedtest app to test the...

@Aatt Hi, How many Deco units do you have? Will all Deco units have the same issue? If only ceratin Deco unit has the issue, please try swapping it with another Deco unit or testing it in a different...

@MarkB47 Hi, It is usually recommended to add Deco units to extend the Deco network. Do you want to extend the WIFI to another building? The outside environment may affect the wireless connections...

@Tussockland Hi, Here is the release note for firmware 1.6.4. You can also check it on the official website.