Answered: Why does the app produce an unexpected sound on a real device but work correctly on the iOS 26.5 simulator?

Mon, 14 Sep 2026 05:22:22 +0000

One possible reason could be that the issue is related to the difference between the iOS Simulator and the physical device, especially since the sound occurs only on the real device.

I would suggest checking the following:

Audio Session configuration – Verify AVAudioSession settings such as category, mode, and activation. An incorrect audio session configuration can sometimes produce unexpected audio behaviour on a physical device.
Hardware/Bluetooth interaction – Since these applications communicate with external vehicle sensors/hardware, check whether the unexpected sound is related to Bluetooth or the connected hardware. Testing with the hardware disconnected could help isolate this.
Audio output route – Check the actual audio route on the physical device using AVAudioSession and confirm whether the sound is being routed through the expected output.
Compare device logs – Capture the Xcode console/device logs while reproducing the issue on the physical device and compare them with the simulator logs. Any audio-session, Bluetooth, or Core Audio warnings may help identify the cause.
Test on another physical device – If possible, test the same build on another iPhone. This can help determine whether the issue is device-specific or related to the application itself.
Test with different iOS versions – If the issue occurs only on a particular iOS version, it may indicate an iOS/device-specific compatibility issue.

Since the application works correctly on the simulator but produces the sound on a physical device, I would first focus on AVAudioSession configuration, audio routing, and the connected hardware/Bluetooth communication.

These checks may help narrow down the root cause before making code changes.

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Answered: Why does the app produce an unexpected sound on a real device but work correctly on the iOS 26.5 simulator?