How to take screenshots on devices that's provided by Android and Apple?

You may be wondering why can't we take screenshots on our devices, unlike Apple's products, they can take screenshots easily.
But, actually, taking screenshots on your devices is easy. Don't believe what Google Play Store screenshots' applications said to root your tablets, it's useless and nonsense, it will only break your devices.

Here's how to take screenshots on your devices that are provided by Android:
1. Press and hold the power and volume - button together for about 3 seconds

And here's how to take a screenshot for Apple's products:
1. Press the Power and Home button together

Easy, right?
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