Most recently, Verizon came clean on a list of devices that will see updates that allow for global roaming. For those unfamiliar with the term, the update will allow Verizon customers to roam internationally on 2G and 3G GSM networks. Missing from the list at that time, presumably due to it not being official was the Samsung Galaxy S III. Now that the device has gone official on Verizon, they've confirmed that it too will see a global roaming update eventually. For now, Verizon isn't saying much about when the update will arrive other than to say it won't be there at launch but will come via a software update in the near future.

Source: PhoneScoop