Samsung S20 opens the screen and a pop-up window pops up at the bottom.

1. Open the notification bar and check whether there is "Clear" in the upper right corner of the notification bar. If yes, please click to clear the information in the notification bar. 2. Standby interface-slide down the top screen-find an advertisement message and hold it down-it will prompt "Apply"-click to enter and cancel the check mark before "Show Notice". 3. The automatic pop-up advertisement push information may be the push information of downloaded third-party software. It is recommended to disable the information push function through this software setting option. 4. If it is invalid, it may be related to the downloaded software. It is recommended to uninstall and delete the corresponding software. 5. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore factory settings (enter phone settings-reset-restore factory settings). If the problem of restoring factory settings still exists, it is recommended to send the mobile phone to the nearest service center for testing and further processing.