Motorola E4 plus in built voice problem

I bought a mobile model Motorola E4 Plus, through Flipkart…the handset was having problems of voice clarity i.e once you keep the phone little far from mouth other side voice will break or can’t listen properly. I tried with other networks like Airtel, Vodafone, MTNL too..all we’re having same problem… contacted Flipkart for exchange of handset they refused to change…after giving warning to go on social media and consumer court they changed the handset with same model…after one month.
Now new set also have same problem…my intention to post on this site is very clear , for choosing this product as seller is not accepting his fault and I am loosing my business due to voice clarity of phone… improper communication…

Pradeep Sahni
Rampur 110091, New Delhi
Email: pxxxxxxxxx1@gmail.com