On many earbuds, you can electrically short the microphone by holding the button. However, the OS will likely detect that and might react by ending the call or something, and if you plug in your headphones in that state, the mic will not be detected.
On many earbuds, you can electrically short the microphone by holding the button. However, the OS will likely detect that and might react by ending the call or something, and if you plug in your headphones in that state, the mic will not be detected.