To enable this feature on your iPhone, go to Settings-> General-> Accessibility-> Phone Noise Cancellation, then make sure it is enabled or turned on. ... Restart your phone after making necessary changes to these settings then see if that fixes the problem.
How to fix static noise, audio cutting off, and no sound problems ... - iKream
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If your Android phone keeps cutting out during calls, install the latest Android updates and restart your device. You can also remove your SIM card and turn off Voice Privacy during calls. If the issue persists, use Wi-Fi Calling, and contact your carrier for further help.
Fix: Android Phone Keeps Cutting Oout During Calls - Technipages
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If the audio sound is intermittent through one or more of your speakers when playing your stereo, there may be a problem with the connection or a problem with the speakers. ... Turn off any nearby electronic devices that may be interfering with the speaker sound. Move the speaker wires away from any electrical cords.
The sound cuts in and out intermittently from one or ... - Sony
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