I am going to be travelling around England for about a week later this month and I am always happiest travelling when I have access to data (nothing like a google search or map to confirm you are in the right place). Right now I have an iPhone 5s on AT&T and I was wondering what my best bet is for getting a short term data plan while I am overseas. Is something like AT&T Passport my best bet, swapping out the sim card or something else entirely?