to deploy on device or simulator, go to: siphon/Siphon2/ Launch Siphon.xcodeproj and deploy
radif/SIPHON-SIP-Client-that-actually-compiles
SIPHON SIP VOIP Client that actually compiles and runs on ios5 non-jailbroken phones. Works on the device and simulator! (GPL). Here is the original repository: http://code.google.com/p/siphon/
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