This is such a newbie question, so I apologize in advance. I currently have a S3 w/ VZW but would like to know how I can get global roaming for a reasonable cost? From my understanding, since I can't take out my VZW sim card and the phone isn't LTE, I will have to purchase an unlocked phone w/ a sim card? If so, do you have any recommendations for a reasonably priced smartphone and sim card that can be used in almost every country? Thanks!