If you bought an iPhone recently, you might want to check it for dead pixels. Dr Macenstein was watching a “certain Harry Potter movie” one night on his iPhone when he noticed a defective pixel on the touchscreen display. Dead pixels are usually a single picture element (or a single dot on the screen) that was not manufactured properly, hence the term “dead”.
According to the good doctor, Apple does not have any “official dead pixel policies” in place, so he managed to get his handset swapped for a new one. If you’ve got similar issues, Appletell recommends doing the same thing before Apple puts the roadblocks in place. To make things simpler, there’s a Stuck Pixel Test Page to test your iPhone’s display. Just follow the on-screen instructions.