I know this is similar to a recently posted question on phone cards, but I'm limited on international travel experience and heading to GC on Monday. My wife has an iphone with AT&T. I have a (business provided) HTC Evo with Sprint. I've looked into the options for both as to handling calls. I added international calling to my wife's plan so that we can make calls for $1.65 / min (if needed). But as far as the settings and not racking up data charges....little confused. Do most smart phone users disable their 3G/4G settings and does this avoid the data fees? If I enable roaming to receive/make calls will this allow data (charges) to come through via email, etc...? I know, more of a cell phone forum question, but hoping a Grand Cayman regular has a quick answer/suggestion. Thanks!