> Most cellphone providers use IPv6.

I don't think that's right at all. It might be true in the USA, but that's only like 3 providers, isn't it?

I'm in the UK and I don't have IPv6 on my mobile or at home. I travel to ROI often and my phone has never picked up on IPv6 address. I was in Italy a couple weeks ago and I never got an IPv6 address. I know I checked because a friend of mine keeps telling me bullshit like this about how real IPv6 is, and I've never had an IPv6 address.

I was in Spain at the beginning of the year and didn't get one; and Germany late last year: No IPv6.