[QUOTE=rshrew;115647]Just buy a foreign SIM card maybe? I have heard if this working well for some people.[/QUOTE]
This works as long as you have a quad band phone like an iPhone. The AT&T sims will work in urban areas of most countries but at high Gringo rates
But everything that I have seen in Latin America is local prepaid and the sims have to be recharged or replaced. You also have to get new sims for each country. You can put them in a quad band phone but some sims have to be cut down to fit the iPhone.