Whose Phone Is This, Anyway?

In a bustling city filled with quirky characters, you find a lost smartphone on a subway seat. As a curious and overzealous protagonist, you decide to delve into the phone's secrets, leading you on a wild scavenger hunt across town. Each contact, app, and message reveals a piece of a larger mystery involving an eccentric inventor, an underground art heist, and a rumor of a sentient AI. Can you solve the mystery and return the phone to its rightful owner before disaster strikes, or will you become a part of the chaos yourself?