How to use mic-headset combo for external mic use in Android KitKat tab? The tab is Dell Venue 7 (non voice call version). On plugging in the combo , the headphones work for headphone pin , but mic pin plugging does not allow mic access? Next , if mic can be enabled too, then how to use both headset and mic simultaneously for say meeting (startmeeting), as both pins are different and socket is one. OTG would not work as became clear from earlier queries.