Verizon has deployed IPv6 on their LTE network. This is a screenshot of an LTE-attached netbook. You can clearly see the IPv6 address:

(credit to Paul’s Random Crap for noticing this).

Back in 2009, Living with IPv6 reported that Verizon mandated IPv6 support in LTE devices. It’s good to see that they’ve taken the next step and enabled IPv6 on their network, and that they’re doing so with globally routable addresses

Source: Living with IPv6