Samsung Galaxy Indulge help?

[HelpPrease]

Ok, so I have one, and whenever I'm ona call I can't hear the other person and they cant hear me if I put the phone to my ear, and the sensor doesn't work, but I can hear if I put it on speaker or use earphones.

Also, I can hear music through the speaker and earphones.

 

[Nuknfutz]

Throw it in a river and get an esteem