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I'm curious how the mobile network operator whitelisting in dual-sim routers like the RUT950 ist actually working. Is it possible to maintain a dedicated whitelist per SIM card or is it a global whitelist or does it only affect the primary SIM?
Use-case: I would like to put such routers in a small fleet of mobile homes and caravans which travel through Europe. To have full network coverage without manual intervention I would put a SIM from a EU operator and one from a Swiss provider into the router but I want to prohibit a roaming connection from the EU SIM to a swiss operator and vice-versa.