CallKit VoIP Developer Specialist

CallKit & Real-Time VoIP Audio/Video Infrastructure for iOS

Deliver native lock screen call UI, instant VoIP push wakes, and high-quality WebRTC audio/video calls on iPhone.

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Common VoIP Issues on iOS

Incoming calls failing to ring when the app is killed or device is locked.

App Store rejections for improper PushKit payload usage.

Audio route glitches when switching to Bluetooth headsets or speakerphone.

Call drops during network handoffs between Wi-Fi and 5G.

Enterprise CallKit & WebRTC Architecture

Native CXProvider and CXCallController setup matching iOS system phone UI.

PushKit VoIP push notifications guaranteed to wake app instantly.

AVAudioSession management for seamless Bluetooth, AirPods, and speaker routing.

Resilient WebRTC signaling state machine for crystal-clear calls.

Frequently Asked Questions

Q: Does CallKit show calls on the iPhone lock screen?
Yes! CallKit renders full-screen incoming call UI exactly like a regular cellular phone call.
Q: How do you handle PushKit compliance for App Store review?
Every PushKit notification must immediately report an incoming call to CallKit, fulfilling Apple's mandatory policy.

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