Hi, I'm going to the USA this summer. I'd like to be able to use my iPhone 3G, especially for 3G. What are the possibilities for this in the USA for about 1 month. My iPhone hasn't got a simlock (factory unlock). I think it's a good idea to make a list of how to use 3G per country. I'll start with my own . In The Netherlands you can buy a pre-paid Vodafone Sim-card. This means you don't buy a contract, but you just buy a sim card which you can top up. However, this will cost you about 20 euro's, which is about 25 dollar. After you've bought it, you have to call the Vodafone service line at number 1200. Then you'll have to activate Vodafone Internet Blox, which will cost you €10 per month (but you've got €20 spent on the sim card so you have got €20 credit on that card). They use a Fair Use Policy This means there is no bandwith limit, but you shouldn't use more then about 2GB per month, or they might cut you off. When you leave the country, just throw the card away. Only cost you €20 .