Samsung Galaxy S25 Microphone

The Samsung Galaxy S25, like most modern smartphones, does not have a single “mic,” but rather a system of multiple microphones to handle various functions, including:

1. Main/Primary Microphone (Bottom):
   • This is the primary mic used for voice calls when you hold the phone to your ear.
   • It’s typically located on the bottom edge of the phone, often integrated into the charging port (USB-C) flex cable assembly or as a separate microphone module.
2. Secondary/Noise-Canceling Microphone (Top/Rear):
   • This mic is used for noise cancellation during calls, for audio in video recordings (especially on the rear camera), and for speakerphone calls.
   • It is usually located on the top edge of the phone or near the rear camera module.

Key Component for Repair/Replacement

If you are experiencing issues with the microphone, the replacement part you would likely need to look for is the Microphone Flex Cable or Microphone Module.¹

• For the main microphone, this component is often called the “Charging Connector Flex PCB Board” or “Main Flex Cable,” because the microphone is mounted directly onto the same circuit board as the USB-C charging port.
• For the secondary microphone, it is often a small, separate microphone module or is integrated into a different small flex cable on the top of the phone.

In summary, if you are looking to troubleshoot or replace the component, you would generally be dealing with:

• Part Name: “Microphone for Samsung Galaxy S25” or the specific “Microphone Flex Cable” for the S25 model (SM-S931B), S25+ (SM-S936B), or S25 Ultra (SM-S938B).
• Location: The main one is at the bottom of the device, near the charging port.

If you are having microphone problems, always try cleaning the tiny microphone holes first, and then run a diagnostic test using the Samsung Members app before considering a hardware repair.