The Deco X50-5G should generally be well suited for your project. 😊To extend the internet connection to the other floors and the annex, you can use a Powerline Mesh system – provided that all floors and the annex are on the same power grid. In this case, the
Devolo Magic 2 WiFi next Multiroom Kit would be a suitable solution. The adapters use the power lines for data transmission and simultaneously set up a Mesh Wi-Fi. Since the internet connection in your case is via a 5G SIM card, the mobile connection is in most cases the limiting factor and not the Powerline connection. Depending on reception and tariff, the maximum speed of the Powerline is therefore often not fully utilized. If the areas are not connected to the same power grid or the electrical installation is unsuitable, additional Deco Mesh devices with a wired network connection would be the more reliable alternative.
If a slightly simpler and cheaper solution is sufficient for you, a Wi-Fi repeater can also be a good alternative.
TP-Link RE550
Unfortunately, we are currently not aware of a black version of the Deco X50-5G.