This icon appeared yesterday and nothing removed it. It looks like a white talking box within a black circle. If you press on it you can drag it around but it doesn't stay on just one screen. It covers up other icons and texts. Also when you hold it the icon will turn blue and then anything you touch after that will highlight with blue and play text to speech. I'm not sure how I loaded it and I have no clue how to get rid of it. Any suggestions?