vod dont advertise that rtg works in the us however there have been cases where it has worked however because they dont advertise it they wont guarantee costs or wether it will work or not, o2 speakeasy does work so you wont have any problem with them, and they advertise costs on their website, meteor will work to but you have to go to a meteor store give them a weeks notice or either top up by 60 euro or register a credit card with them, and plus you can keep your no and move to o2 or meteor