Can you trace back a fake phone number?

Can you actually trace a fake phone number? I've always wondered about this, you know? Like, what if someone's messing with you? The short answer seems to be a big fat no. Think about those burner phones you see in movies all the time – they're practically made for anonymity. Makes sense, right? They're temporary, disposable… like a secret agent's gadget, almost. They give you a number that isn't connected to you… your name, address, any of that. I remember reading something once about how these burner numbers are really hard to trace, practically impossible unless maybe… I don't know… the FBI gets involved or something? Think about it – if they were easy to trace, what would be the point? It'd defeat the whole purpose! So, yeah, tracing a fake number? Pretty tough. Almost like trying to find a needle in a digital haystack.