1. The mysterious keyboard
Noticed those small raised lines on the F and J keys of your keyboard? Yes, it does have a purpose. It helps you to find the home keys when you are typing away.
2. That small iPhone hole
Well, it is actually a microphone embedded into the phone body.
3. Those charger hooks
You must have encountered those small white hooks on your Apple charger. They are not 'useless'…
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