Once you notice glitchy behavior, your first action should be to examine your phone for any external damage. A cracked or chipped screen may be causing your phone to malfunction. Remove any screen protectors or stickers and make sure the screen is clean as debris on it can register contacts and cause issues. If none of these factors seem to be causing the problem, it’s possible that the flickering display isn’t related to a clear case of surface damage.

In some cases, a flickering or flickering screen can be caused by issues with the hardware inside the phone, in which case you’ll likely need to take the handset to a professional for repair. If you’re not afraid to open the device (and that won’t void any warranties you might have), consider removing the back of the phone and carefully checking the display flex cable to see if loose or damaged. Android forums are full of threads from users who have narrowed down their display issues to a damaged flex cable or a loose connector.

This should be a last resort, however, as it’s likely that the problem is caused by a software bug, faulty app, or your phone’s settings. Your first troubleshooting attempt should involve restarting your phone. Turning a phone off and then back on is a common way to fix many problems, including annoying crashing issues, and it’s the quickest troubleshooting method. On most Android devices, just press and hold the power button for several seconds to turn it off, then long press it to turn the phone back on.