Earpiece not working suddenly. topic

Hi Guys,

I am on AOSP rom 4.4.4.
Till yeseterday, my mi3 phone was working fine. From today morning, i am not able to hear anybody voice during calls.
I guess the earpiece is dead. Can somebody help me to test it.

I tried to do hardware testing using *#*#64663#*#* and *#*#6484#*#* , but with no luck.

Cheers!!!