I have a Galaxy S20+ and whenever I am on a call, part of the screen flickers. This issue is not specific to an app and can be replicated through any app that allows you to make calls (phone, Skype, WhatsApp). My girlfriend has a Galaxy S20 and she has the same issue as well. I have videos of the issue, however, I don't see a way to attach them to this post.
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So what it sounds like what your seeing is the proximity sensor. Since the sensor is behind the screen, during calls, etc., you will see a single pixel lighting up to the right of the selfie cam. This is completely normal. If your on a call and place your finger over that pixel, you should see the screen go dark.
I hope this info helped in any way. Have a great day.
Hello @Samsung_VODEiwx ,
If possible can you please take your device to the nearest Samsung certified center to be inspected (your gf phone as well). We would like to run diagnosis on it in person and provide the best resolution.
For Samsung Care Authorized locations near you:
Also @SamsungAdam can you please collect his device information in private messages for logging purposes. Thank you.
Hope this was helpful!
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Hi @BlackOnyx6 ,
Thank you for the swift response. I will wait till the pandemic is over to visit the nearest Samsung store. Meanwhile, I'd be happy to provide you with any information that you need.
@Samsung_VODEiwx in that case you definitely need a screen replacement. If there is no physical or liquid damage to the device a screen replacement is covered under your warranty. It needs to be inspected by a technician to verify no physical or liquid damage. If you have a secondary device to use for the time being you also have the option to mail your device in by using the same link I provided.
*Does the pixel thats flickering happen to be in center of the screen at the very top? (I just want to verify its not a sensor)
If at all possible try to attach the photos or videos in a private message to me.
@BlackOnyx6 The flickering pixels are at the top, to the right of the front camera. It seems that I cannot send you a private message as your user name does not pop up int the recipients. Could you shoot me a message so that I am able to reply to it?