The phone on the receiver side is the ear piece. It may be damaged by water, liquid, fluid intrusion. It may result in no voice or broken voice. The phone denies receiving the voice if the ear phone gets hurt. Therefore to have a two way communication the ear piece must be repaired or replaced.
Our technicians use genuine parts for replacement and repair it with standard. You can visit our service store, have a live chat with us, call us at o4 4211494 or email us at firstname.lastname@example.org you can avail FREE PICK & DROP SERVICE for your damaged Nokia Lumia 900.