This is part of the Android Clat project.

Installation instructions

How do I switch the cell internet connection to IPv6 (for t-mobile)?

Go to Settings > (Wireless & Networks) More > Mobile Networks > Access Point Names > and add: name="T-Mobile US IPv6", apn="", type="default", protocol="IPv6"

How can I test that 464xlat is operating properly?

While on the IPv6 APN, visit this helpful ipv6 test page

Where can I see the source code?

The source code is on github

I have a question that isn't covered by the FAQ

Email me at dan-android AT or DM @dpdrown on twitter.