non working phone after Facetime
I finished a Facetime call with a friend in the USA and a small black square remained after the call in the top right of my screen. Nothing on my phone (iphone XR) will now work. I can't turn it off, apps press but don't function and I can't get rid of the black square which is now the same size as my screen!
Has anyone experienced this and how do I get rid of the black screen?
Thanks
iPhone XR, iOS 14