MVNOs in the US haven’t had the greatest of success, with Virgin Mobile USA the most recent big-name to be gobbled up by a “proper” carrier. However one UK company has obviously decided that the scene there is crying out for a new carrier option, and hence giffgaff has been born. Based on O2’s network, giffgaff is still playing coy with their pricing but is suggesting that users will be able to earn back up to 100-percent of their pre-pay top-ups via good deeds to other users and the MVNO themselves.

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