Why is my phone so slow? Reasons your phone slows down and how to make it faster

If you've owned your phone for a long time then chances are you've found it feels slower and less responsive than it used to be. Even the best phones around will slowly but surely become sluggish without some care and attention. This is the case whether you own and Android phone or an Apple iPhone.

Source : https://www.pocket-lint.com/why-is-my-phone-so-slow/