Q. How to install a mini microphone?

It is entirely dependent on the kind of equipment that you are making use of. For instance if your Android device has a headphone jack and doesn't require an adapter you'll be able to put in a microphone that has a 3.5mm TRRS connection socket just like this one! Make sure that you give the app permission to utilise any external devices if you are using an app that requires authorization to do so in order to function properly. In addition to this you need to check to see which kind of tiny microphones are supported by the device you're using.