My husband and I went for a complete tour of Europe and our parent’s  biggest worry was how would we stay connected to them. My husband was worried that with multiple sim cards it would be such a headache and obviously expensive as well! A friend told us about the Prepaid European sim card by Matrix and we decided to go for it.! We had a single matrix sim card which could be used in multiple places plus since it was pre-paid we knew exactly how much we were spending on it..  Along with that it had free incoming calls so was pretty chill while we enjoyed Europe :)