I didn't see the model of your tablet; if it has a phone function, it's quite possible that it'll have the microphone (for handsfree) available via the 'headphone' jack. This requires the use of a 4 terminal 3.5mm plug, with the terminal functions being: L aud, R aud, GND, mic OR L aud, R aud, mic, GND.I considered audio injection, via the microphone. The mic is built into the tablet too and unfortunately this one has no audio INPUT jack, just an audio OUT jack for headphones. So i'd have to use a small speaker and mount it right under the mic (which would work) but then i'd have to hear the noise of the data transmission which would sound like a telephone modem