IPhone XR started flickering badly after 13.6.1

Try and Force Restart your iPhone exactly as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears then release the Side button (Can take up to 20 seconds. DO NOT release Side Button when invited to Slide Power OFF).  

Axel F.

If your iPhone XR screen is flickering continuously no matter which app you are using then this could be a hardware issue. Please contact ➔ Apple Support for service.

Axel F.

I'm seeing flickering on iPhone 8. Suspect it could be the recent OS upgrade to 13.6.1 as well