Hello I'm new here.

My phone recently started acting strange.

If I hold down the home button (which reveals recent apps), some of the apps don't have the correct icon and are replaced. For example, I had open texts between me and one person I then pressed the home button to take me to home, i then held down the home button to reveal my messages but not with a smiley face (the normal icon) but with a Green box with a white circle inside this has happened with more than just messages.

Any help?