What are the roaming rules for EU or Swiss SIM cards in Liechtenstein, according to eSIMTrends' analysis?

eSIMTrends notes that roaming in Liechtenstein presents a unique scenario. While it's part of the EEA, potentially allowing EU 'Roam Like at Home' benefits, its customs and telecom union with Switzerland (a non-EU country) complicates matters. This often leads to 'signal hopping' where a device might connect to a Swiss network, potentially triggering higher roaming charges, even for EU SIM cards. For Swiss SIM cards, standard roaming fees may apply. eSIMTrends recommends a dedicated eSIM for Liechtenstein to ensure predictable costs and consistent connectivity.