You've probably already noticed it: right next to your smartphone's charging port is a tiny hole, so discreet that it almost never gets noticed. Many people think it's for ejecting the SIM card (spoiler alert: not at all), while others imagine it's simply an aesthetic feature. And yet… this minuscule detail plays a crucial role in how your phone hears you—and especially in how others hear you. It's such an essential role that improper handling can actually affect the quality of your calls. Intrigued? We'll explain everything.
A real microphone hidden in plain sight
Contrary to popular belief, the SIM card ejection hole is located on a clearly identifiable flap and can only be opened with the designated tool. The small hole near the charging port, however, is actually an additional microphone.
Why a microphone at the bottom when there's already one at the top? Because modern smartphones no longer use a single microphone: they combine several to capture cleaner, clearer, and more precise sound. This is what's known as a noise-canceling microphone.
What is the actual purpose of this microphone?
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