It looks like a random string of characters—unassuming, often ignored. But that 11- or 12-digit code etched onto the back of your Mac, buried in your iPhone’s Settings app, or printed on your AirPods case is one of the most powerful tools in the Apple ecosystem. It’s the serial number, and learning how to perform an is like finding the key to your device’s secret history.
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It takes ten seconds and could save you hundreds of dollars. Have a serial number horror story or a success story? Share it in the comments below. apple serial look up