Does anyone have experience of using an unlocked UK dongle to allow sim cards with US data bundles on? The idea is to be able to connect to the web using the dongle and just purchase sim cards for the countries we visit. Sounds too easy I guess. Any help would be appreciated.

One other thing I have found is that Vodafone dongles are not transferrable between territories. Buy one in Marquesas, it doesn 't work in Tahiti. Or Fiji. Have to buy local dongle.