Galaxus uses the Sunrise network. Neither this nor the one from Swisscom worked with this router and I sent it back. Now I have the Fritzbox router and it works perfectly. However, I use it with the Swisscom network.

I got a digitec flat10 SIM card for free with the device. Plug it in and off I went after activating the card. I then tried out my Swisscom SIM. Works without any problems. Multi SIM or Multi Device also work without any problems.

My router runs perfectly with a Salt SIM, so if you have good reception with your Multi SIM from Galaxus, the router will also run well. LG