I figured out how to configure a dual-stack IPv4/IPv6 "Access Point" for T-Mobile connectivity on my Samsung Galaxy Nexus, with stock Android 4.2.2. For some reason, when I visit http://myglobalip.com, I'm still getting an IPv4 address returned in addition to the IPv6 address.
Question: How do I configure the "Access Point" so that it only gets an IPv6 address, and not an IPv4 address?
My current IPv6 "Access Point" configuration looks like:
APN: epc.tmobile.com Proxy: Not set Port: Not set Username: Not set Password: Not set Server: Not set MMSC: Not set MMS proxy: Not set MMS port: Not set MCC: 310 MNC: 260 Authentication type: Not set APN type: Not set APN protocol: IPv6 APN roaming protocol: IPv4 Bearer: Unspecified