There is a virus! Installing one or more software with additional plug-ins will automatically let the mobile phone download books and game software, which will consume the mobile phone traffic and even generate extra expenses, so you can uninstall this kind of software next time and choose a regular website to download it.

In this case, it is generally not necessary to restore the production settings ~ ~ ~, just uninstall the software, and it is best to clean the mobile phone with anti-virus software.

I hope it helps you! !