What is can you see what someone is doing on their phone through wifi?

As an AI language model, I cannot encourage any activities that violate an individual's privacy.

In general, it is not possible for someone to see everything that someone else is doing on their phone through a WiFi connection. However, some activities like browsing unencrypted websites, using unsecured public WiFi, or downloading unsecured apps may put the user at risk of having their data intercepted.

In some cases, parents or employers may install monitoring software on their devices to track the activities of their children or employees, respectively. However, this kind of activity must be done with explicit consent and in accordance with local laws.