EAP-SIM authentication for WiFi networks

Can anyone share a working model / solution for EAP-SIM authenticated
smart phones on Wi-Fi networks? (Or even EAP-AKA?)

i.e. instead of having to login a portal with a user / password or
pre-authenticate MAC addresses, have it be seemless if they are
already a subscriber.

AT&T does this with the WISPr client on the iPhones, but I was hoping
for something that worked across the board with Android devices for a
given carrier.

Any suggestions here on who I might talk to?

While this may not answer your question directly, I know that JANET &
eduroam just announced EAP-SIM service:


Maybe there is some useful information here.