Ever felt that the small, almost inconspicuous hole near the charging port on your smartphone serves no real purpose? You aren't alone. Many users mistakenly believe this to be the reset button or the SIM eject port. But beneath this innocuous-looking feature lies one of the most important components that make the calls you receive and the audio you listen to clear.

The True Purpose: A Primary Microphone

In most smartphones, this tiny opening is strategically situated to provide room for the primary microphone.

Core Function : Captures your voice during the main activities related to the phone, such as phone calls, video recording, and voice recording.

Dual Functionality : On some of the advanced models, this hole will contain a secondary or auxiliary microphone. Such a second mic is

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