Step 6: To connect the hands free with the circuit
there are always two connections which come out of the phone,
these connections are
i'll prefer to use handsfree which have a straight jack (similar to the ones which we use in our ipods, but a thinner one)
the tip of that jack is called the "tip"
and the rest part behind the tip after a black strip is the ring So connect these two connections with the circuit and you will be done