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Ross Chandler
It might be worth pointing out that Mobile/3GPP deployment of IPv6 is also happening and might end up overtaking fixed deployment. Mobile handset turn over almost completely every 4 years. Android and Windows Phone are already completely IPv6 ready. The changes Apple are making to iOS 9 will have them ready for every major case except tethering of IPv4 traffic when the mobile device uses a single IPv6-only bearer connection (as used by 464XLAT/RFC6877). All four major mobile operators in the US are already providing IPv6 Internet access. Two of them, Verizon Wireless and T-Mobile US, already have a majority of their subscribers with it. Several mobile operators in Europe are also providing IPv6 access.