Linphone and FlexiSIP are now compatible with IPv6-only networks.
As Apple officially announced, the App Store policy will by June, 1 require that all iOS apps include support for IPv6-only networks.
We are pleased to announce that Linphone is IPv6-ready. Belledonne Communications will submit a new iOS version of Linphone on June, 1 to the App Store in order to demonstrate that the application passes Apple IPv6 tests.
FlexiSIP, our SIP proxy-server implementation for IP to IP calls, is compatible with IPv6 networks as well. IPv6 support has been activated on the FlexiSIP servers in charge of our free sip.linphone.org service.