What causes a touch screen not working on an iPhone?

[Kundan Kumar]

If the touch screen is not functioning properly on an iPhone, it could be due to both software and hardware problems. Software problems that could be causing the issue include system glitches, frozen applications, low storage capacity, or an outdated version of the iOS operating system.

Hardware problems that could be causing the issue include a damaged screen, exposure of the iPhone touch screen not working properly to water, a faulty internal component, or a faulty screen protector that is affecting the touch sensitivity of the screen.