HTC TyTn II, Windows Mobile 6, Opera Mobile/Opera Mini/PIE, using wifi and pfSense router.
(Dutch cellphone providers aren't doing anything with IPv6 as far as I know, and there is online one ISP offering IPv6 connections...)
ipv6.he.net works , but v6.testmyipv6.com and ipv6.google.com not, "could not locate remote server".
Both can be successfully ping6'ed on pfSense's console through Putty.
Never mind, thought it worked, still seeing my IPv4 address...