There are no security options in my phone settings. What should I do?

This situation is hard to say. It is possible that the security center of the mobile phone is not working well.

In this case, the appearance settings of the mobile phone can be restored.

There is also downloading a mobile phone security software on the mobile phone.

The security software on Android phone is very easy to use.

Tencent mobile phone housekeeper, mobile version of Kaspersky security software.