Xiaomi India — microphone problem since purchase,

I am getting good voice from other side, even from a very cheapest mobile phone.
But astonishingly, my voice is not getting by the other side person. Initially, i thought of signal problem. But not at all. So, i have been suffering this deficiency since purchase. Not only that credibility of the producer has become at stake.

An early action is highly solicited.

Waiting for your positive response,

Yours faithfully,

Md. Sarafat ali sheikh