This feature mutes all incoming audio and vibration, causing calls to bypass the ringer entirely and go directly to voicemail. While this usually results in immediate call failure, intermittent signal loss can cause a similar effect.
Why Airplane Mode Silences Your iPhone Calls
If the phone fails to register on the network or if specific do-not-disturb features are enabled, the phone will terminate the connection at the network level, resulting in a silent experience for the caller. This specific silence usually indicates that the device is reachable by the cellular network but is actively rejecting the incoming audio stream before it reaches the speaker.
A speaker clogged with debris or damaged internally will fail to produce sound, even if the call connects perfectly. Similarly, a disconnected or faulty ribbon cable can prevent audio output.
Why Airplane Mode Silences Incoming Calls on iPhone
The issue is almost always software or configuration-based rather than a hardware fault with the speaker itself. If this is set to "Always," the phone will not ring even if Do Not Disturb is turned off manually later.
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