If you take the SIM card out of an iphone can the police/ family still track you?

So I watched this movie called SALT it's not that old but it's a good movie. In one part she takes the SIM card out of the phone so no one can track it.
But is that also true with iPhones? Like of you take the SIM card out can the police still track your phone. Because I was think yes because it has your number. But is that true? It's not traceable if you take the SIM card out. But if not is there a way and how?

Law enforcement can track you with the IMEI #, this is built into the phone you can't change it. But on the consumer level random people couldn't track you.

Yes they can track it with the gps.

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