The advertisements that pop up during the use of mobile phones mainly come from third-party applications installed in mobile phones. I suggest you try the following two methods to solve it:

Method 1:

Call up the background task page of the mobile phone to see if there is any application corresponding to the pop-up advertisement. If there are money-making applications such as cleaning, WIFI and walking, it is recommended to uninstall the corresponding software and use observation (you can go to Settings-Applications and Permissions-Application Management to see if such applications are installed);

Method 2:

Download the third-party advertisement blocking software, such as "AdGuard" application, and you can open this link:/welcome.htmlDownload the software to block advertisements. After the download is completed, open the software-click the bottom to accept-select Quick Setup (1 min)-create a local VPN and select OK-click the "X" symbol in the upper left corner of the jump page-the opened page will display protection.