@Hasayeret Ask your ISP at new place for configuration settings, how to configure your WiFi router to connect to their modem. If you can take Archer VR400 to new place at least temporarily, it may be...

@Hasayeret If you have Archer VR400 connected to the modem, check its connection settings and use same for Main Deco.

@Hasayeret 1. You will not need to do anything to define Deco mesh as running in Router mode. 2. You should have Quick Start guide with Deco set, which will guide through initial setup and...

@ZebDub88 Check this: Deco M4/S4_V2 Support Connection Preference

@Hasayeret If you have modem which is separate from the router, I would recommend connecting Main Deco directly to the modem. Main Deco in its default Router mode runs as a standard router with all...

@ErnstSl Sorry, I am out of ideas.