The bumper back update is the latest major software update for all Android phones, rolling out on Pixel handsets first.

If this doesn't fix the screen flickering or flashing problem, your next best bet is to boot the phone into safe mode and hope that an app, not a hardware malfunction, is causing the problem.

An unresponsive touch screen on an Android phone or any smartphone for that matter could be just a result of a minor software-related issue or a serious hardware problem involving the screen itself.