Microphone for Samsung Galaxy M40

The Microphone in your Samsung Galaxy M40 is a small electret or MEMS capsule that converts sound waves — your voice — into electrical signals that the phone processes and transmits during calls, recording, and voice input. Most Samsung Galaxy M40 devices have the primary microphone located at the bottom of the phone near the charging port, and some also have a secondary microphone at the top for noise cancellation. This listing covers the primary bottom microphone unless otherwise specified.

Open the voice recorder app and record a short clip. If the recording is completely silent — no background noise at all — the microphone capsule itself has likely failed. If the recording is very faint or distorted rather than completely silent, the Microphone IC may be the fault. A technician can test the capsule directly with a multimeter to confirm on your Samsung Galaxy M40.

Yes. The microphone capsule on your Samsung Galaxy M40 is extremely sensitive to moisture — a small amount of liquid entering through the microphone port can cause corrosion of the capsule membrane and immediate failure. If your microphone stopped working after liquid exposure, dry the phone thoroughly and check the microphone port for corrosion before replacing the capsule.

The primary microphone on most Samsung Galaxy M40 devices is located on the charging flex PCB board or a separate microphone board near the bottom of the phone. Replacement involves opening the phone and either replacing the full charging flex board or desoldering and replacing the microphone capsule specifically. Professional tools are recommended for your Samsung Galaxy M40.

Yes — a 7-day replacement warranty covering manufacturing defects is included. An unboxing video is mandatory for all warranty claims. Microphones showing signs of liquid damage or physical damage from improper installation are not covered under warranty. For more information, check out SAHII's Return Policy.