How to find my stolen iPhone? - 1

I have signed in with Find my iPhone app. But what do I do once my iPhone 5 is stolen? How do I track it via my PC?
Also, how can the app locate my phone if I have turned cellular data off (I never turn it on) and I doubt that the thief will connect to Wi-Fi? And what if its battery dies?
Please help!

By the way, I don't have iLocalis installed because my phone isn't jailbroken. I don't actually know how iLocalis works either (without internet connection?).

Log into the icloud and wait til they connect to Wi-Fi.
they always connect sooner or later.