By Eyeball Networks
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Eyeball Messenger for iOS is a mobile softphone which provides instant messaging, VoIP, and video telephony based on SIP, XMPP, STUN, TURN, and ICE. Messenger is the only mobile softphone which delivers instant, seamless, and guaranteed voice and video calls over any fixed or mobile network, across any NAT or firewall, and on any device, with the added benefits of peer-to-peer media transport.
What's New in Version 10.0.20140804
Increased connectivity through firewalls