We have used the VOICE prepaid sim cards in Scotland, Germany, France, Italy and Switzerland. EACH country had their own unique network and you needed to find a SIM card for each place. It became a CHORE to find a store that carried it. This was last done in 2010 and we needed passport info at each place. Hopefully that has changed now?
2007 335i Monaco Blue 11/06 ED Black Forest-Lindau-Oberammergau-Salzburg
2010 535i Alpine White 10/09 ED Castelrotto-Lake Como-Grindelwald-Zermatt-Gruyeres-Luzern-Alpenzeller
2011 Porsche 911 Midnight Blue Carrera S PDK
2013 535i Carbon Black 07/13 ED Munich-Salzburg-Dolomites-Fussen-Alsace-Frankfut