I am traveling with family to Europe (Italy, Switzerland and France) in July and will be mostly a road trip. Thus, looking at the best option to use my iPhone there. The caveat is that I am still under contract (AT&T Next) and can't unlock it but could use my wife iPhone that is paid for. I noticed AT&T has the International Day Pass and Passport options. The Day Pass look enticing but I heard the taxes and extra fees can be a killer if you use it for more than few days. I might need it for at least 10 to 12 days. I will use it mostly for data (GPS for driving and occasional email). Also, another possibility is to get a World SIM card that I don't need to worry about roaming charges between the countries above or just get a local (single country) SIM card. I am wondering if any of you have any insights that could pass along as the best option and value. Thanks!