I'm leaving with my wife tomorrow on a Mediterranean cruise and I want to take my 3g unlocked iphone with me. I will be arriving in Spain and going to France, Italy, Greece and Turkey. I want to use my iphone for data so I can use the GPS/ Google maps. I'm wondering if I can pick up an 'Orange' prepaid sim up in the international airport in Barcelona Spain that would get me data for the 19 days through all of those countries which I mentioned above. Any help would be greatly appreciated!