Question:

While using the device, a momentary popup sometimes occurs and disappears, and the screen blinks as a whole.

Answer:

• Samsung is aware of the symptom that may appear on devices.
• Regarding this, Samsung is scheduled to release the update to your device software in the near future to resolve the symptom.
• Therefore, please check for updates to your device software regularly via the FOTA.(Settings > Software update)
• To ensure the best experience, Samsung encourages all users to keep software and applications up to date at all times.

To properly use the device before the software update, you can follow the temporary guide below.

1. First, you need to update the Google Play services to the latest version.

•  a) Settings > Biometrics and security > Other security settings > Device admin apps > Find My Device > Disable
•  b) Settings > Apps > Search for Google Play services > More(three dots) > Uninstall updates
•  c) Chrome > Open google.com > Search 'Play services'  > Select 'Play services' update page > Install
•  d) Settings > Apps > Search for Google Play services > Storage > Clear cache > Manage storage > CLEAR ALL DATA
•  e) Settings > Biometrics and security > Other security settings > Device admin apps > Find My Device > Enable  

2. Clear the data and cache of Samsung Message app.

• For this, on Settings, tap Apps > Search for Messages  > Storage > Clear Data and Clear cache

3. Restart the device once.

4. Launch Samsung message app  5. Please use it after Agree on Google Terms of Service screen.