As a rule, a SIM card from the respective country is actually the best and cheapest solution. However, there are also Swiss mobile providers that offer unlimited roaming in the EU.
The Nighthawk M6 (MR6150) does not support the eSIM function. It uses physical SIM cards for the mobile connection, so you cannot use eSIM data packs, such as those from Nomad, directly on this router.
Hi, yes I use the router in Slovenia, Croatia, Switzerland, Austria with the respective SIM cards of the country. Simply insert the SIM card and the router restarts and reception is available. The reception is always very good. Greetings B.Frick