uptake of the IPv6 access has been the lack of IPv6 services. For a long time, the major Internet services (like Google, Facebook, Yahoo and others) did not support IPv6, or supported it only partially. This was also recognized by the Internet community. The Internet Society started to organize World IPv6 Day events. The 2011 World IPv6 Day provided a day during which major Internet service providers turned IPv6 on their main websites for a day to operationally test IPv6. This was considered to be a great success. In 2012, the Internet Society coordinated the World IPv6 Launch, where many Internet service providers turned IPv6 on permanently. This has at least partly released the chicken-and-egg situation between the access network operators and the Internet content providers. It gives good proof of how positive coordination, or perhaps rather peer pressure, can help to bring the industry together. 1.9 Ongoing Cellular Deployments The first 3GPP operator to deploy IPv6 in a commercial network was Sonera (nowadays TeliaSonera) in Finland. They started a trial of IPv6 in their commercial network back in 2004. The IPv6 support was not commercialized, and therefore not accessible to normal end users. Perhaps, the first commercial service deployments were in Slovenia where the national cellular network providers commercialized IPv6 at the same time in 2010, coor- dinated by the Slovenian GO6 institute - a not-for-profit industry association in Slovenia. Recently major operators in North America have started open IPv6 trials, and some of them have commercialized IPv6 with the new Long Term Evolution (LTE) cellular networks. In addition, some Asian operators have launched their IPv6 service, together with the LTE network launch. The major network equipment vendors have had at least basic support for IPv6 service for the end user for quite some time now. However, advanced services that the operators use in their current IPv4 Internet offering might not have been supported for IPv6. The same applies to mobile network equi