What do you mean the phone doesn't have a pop-up window?

Because you set up a firewall, there is no pop-up advertisement.

On the mobile phone, if you download and install the firewall or install the self-contained cleaning software on the mobile phone, the network will not pop up, which is better. Otherwise, if you don't set it like this, there will always be some pop-up networks all day long, which will easily cause the phone to get stuck.