If you are experiencing a screen flickering issue with your Samsung Galaxy, there are a few things you can try to fix it.
Firstly, restart the device to see if that resolves the issue. If the flickering persists, try updating to the latest software version as outdated software can often cause display issues.
Additionally, check for recently installed third-party apps as they may be contributing to the problem. If you are using a protective case, try removing it as this can sometimes cause flickering.
Finally, if none of these steps work, it may be a hardware issue and you should contact Samsung customer support for further assistance.