Visually, inexplicably - and the whole thing with a borrowed cell phone, that blows everyone!
Borrow a smartphone and have another viewer examine it. The owner switches on the cell phone for you, a completely normal, borrowed cell phone. They explain that you have to clean the handset from time to time. Even with careful handling, fingerprints can still be seen on the display. So rub a little over the display with a silk cloth so that it gets nice and clean. Outside is good now. But do you actually clean cell phones from the inside? You answer this question in a moment - and your viewers will not believe your eyes! A light tap with the silk scarf on the display - and at the same time the tip of the scarf is already in the cell phone - so that everything inside is sparkling clean! You push something in - and the tip of the cloth penetrates the cell phone!