Review on ⚫ Ultra-Thin Webcam Cover Slide [8-Pack] for MacBook Pro, Smartphone, Laptop, PC, iPad, iPhone - Visual Privacy Protector, Camera Blocker (Black) by John Chembola

They worked well on all my devices EXCEPT my phone. Since the mobile phone is moved in and out of the handbag, trouser pocket, etc., 2 of them fell off and disappeared at the moment. You need better glue. Also, since they are black and the area around the camera is usually black, it is very difficult to tell at a glance whether the camera is open or closed. I applied light colored nail polish to one half so I knew if I didn't see the color I would know the camera was open.