I note that the MIT ANA tester is only for desktop OSs, and none of the network tools I've collected for Android have BCP38 filter testing built in. Does anyone know if there are such tools for Android and for iOS? I assume that tether testing from a PC would be useless, as the NAT implementation would drop the packets -- does anyone know if there are any leaky NAT implementations that *won't* drop packets with bogus source addresses? Or, alternatively, does anyone know *authoritatively* that any cell carrier's mobile IP network already implements BCP38? And if so, why aren't they bragging about it; at least here? :-) I have added the Small Business page to BCP38.info. Cheers, -- jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274