旧闻了 不过今天才看到

Yesterday there was some news about Windows Phone 7 not supporting the new networking protocol called IPv6. IPv6 is the next version of the Internet Protocol to come after Internet Protocol version 4 (IPv4) has ran out of addresses. A global test flight of IPv6 sponsored by the Internet Society was launched a couple days ago and some noticed that the current Windows Phone 7 devices were not able to connect to IPv6 routers. Today we see that there's information on MSDN that suggests the Windows Phone 7 Mango update will support IPv6 after all. Converting to IPv6 will take a pretty long time anyway, so we're sure your Windows Phones will get updated with the fix before it becomes a real necessity.
Source: WPcentral