Welcome to Android Central! My guess is that the plug is engaging the contact for the speakers, and not just the mic -- and since your wireless mic has no speaker, you're just hearing nothing at all. What's the make and model of the wireless mic? Contact that company's support.
Thanks for responding. I am using a Saramonic Blink 500 wireless mic...( teaching online yoga class). The zoom app on Android lacks the ability to select the input ( mic), and output ( speaker) independently of one another.
On my Lenovo laptop, zoom has the ability to select the mic and speaker separately....everything works well.
I was hoping someone might have encountered my issue, and perhaps figured out a work around.
The mic manufacturer has no idea why this is happening.
It connects into my Samsung A50 via TRRS 3.5mm plug.
I suspect I will need a splitter to separate the mic input from the speaker "headphone" output. If I connect an external speaker, the whole setup should simply look likea headset to my phone.
Interestingly, Android supports "Separate App Sound"
Settings/ Sound and Vibration / Separate App Sound"
Lets you choose an app to play over a bluetooth speaker.
Works well for Google apps... even w my mic plugged in.
Doesnt work for Zoom app....sigh.
The issue is within the hardware of the jack - if there's a plug in it, the speaker is disconnected. You could wire a speaker directly to the mic plug, or you could use a splitter to add an external speaker.