Dear Richard,

27 Jul 18 15:17, you wrote to me:

 RM>>> But when I am connected with WiFi at home it will consistently
 RM>>> have dual stack.
 VS>> My phone can also be dual stack (it shows both the IPv4 and the
 VS>> IPv6 addresses in the network properties, and the IPv6 address is
 VS>> the correct public address from my home WiFi network), but
 VS>> http://test-ipv6.com/ in the Chrome browser shows that IPv6 is
 VS>> not available. Sometimes it shows that IPv6 is available but is
 VS>> not preferred.

 VS>> Any ideas would be appreciated.

 RM> Sorry ... no clue.
 RM> For my it always shows proper dualstack.

After a software update on the phone, a miracle happened:
https://drive.google.com/open?id=0B6fElyRl5MUDRGM0X2dVdGpwS0E

The only thing I don't understand is why the test says "SLAAC=no" while in fact 
it *is* SLAAC (I don't have any DHCPv6 server on this network, just a rtadvd).

OTOH, "after" does not always mean "in consequence of."

Victor Sudakov, VAS4-RIPE, VAS47-RIPN
--- GoldED+/BSD 1.1.5-b20160322-b20160322