Microphone not working on third party apps only (iPhone 6) Recently my iPhone's mic has stopped working but solely for third party apps such as Whatsapp, Snapchat &amp; Telegram. 

I have tried the following:


Restarting my phone
Updating my phone to the latest version
Using compressed air to clear any debris 


I have tested the mic via phone call, facetime &amp; siri and these all work fine as expected. 

Has anyone experienced this issue? The only remaining thing that I feel as though I can try is a factory restore which I'm trying to avoid. 

Any suggestions would be helpful as I haven't found anything through apple support guides for this issue.
Under Settings > Privacy > Microphone you'll be able to allow/deny each app that require the microphone to use it.