Karbonn Mobiles
In built speaker not working. My voice is not audible for other party

I bought KARBONN (K330) mobile on 16/04 in hyderabad.

From recent 3 weeks, my mobile s speaker is not working.

When somebody call me, i can hear their voice but, they are not able to hear to me.

Wanted to go for service center, but due to academic exams, i have not been.

Really not satisfied with my mobile.