Force Restart Your iPhone
If the screen flickering is so severe that you can’t see or control your screen well, you might need to force restart your iPhone.
Force-restarting your iPhone is mostly the same as restarting it normally, but this method lets you restart your iPhone without looking at the screen.
Here’s how to restart your iPhone, regardless of the model:
- Quickly press and release the volume up button.
- Next, quickly press and release the volume down button.
- Finally, press and hold the side button.
- Release the side button when you see the Apple logo appear on your screen.