How to factory reset a PS4 console to wipe your data and restore it to its default settings

You can factory reset a PlayStation 4 from your console's dashboard and via safe mode on your console.

How to 'soft' reset a Samsung Galaxy S10, or reset it to its factory settings

If your Samsung Galaxy S10 is acting strange, here's how to "soft" reset your Galaxy, turning it off and on, or reset it to its factory settings.
ZDNet

How to clear your iPhone cache (and why it makes such a big difference to performance)

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