@angelickevin Hi, The main Deco unit should always be connected to the front router/modem with an Ethernet cable to get internet. If you want extend the Deco network wirelessly, you can add satellite...

@Kimm310 Hi, The main Deco should always be connected to the router/modem with an Ethernet cable. If you add satellite Deco units, the satellite ones can connect wirelessly.

@Tango_Fox Hi, When you switch the modem to the router mode, will it get an IPv4 or IPv6 address from the ISP? Please turn off the IPv6 connection on Deco when you set the modem as a bridge mode, and...

@Shifux2 Hi, It is ok to use Deco to extend your current network. However, the main Deco unit should always be connected to the Archer AX11000 with an Ethernet cable. The satellite Deco units can...

@Disgruntledd Hi, Could you please provide your network topology? How do you connect your devices, and is there a switch in between? If you have a switch, please also provide the model number of it....

@branden Hi, Have you also test the SIM card with other devices like your phone or other router and check if the SIM card can stably work?