Ans: If the headphones are working fine all the time yet they are causing issues, especially while using a particular app, then restart the iPhone and the app. If the headphones still won’t work with the app even after restarting, then the app won’t have microphone access. For this, go to Settings – Privacy – Microphone and check the apps list with mic access. If the mic is turned off for the app, then turn it back and check whether it is working or not with that app.