Sorry. I'm still not clear. Once you make that first call, then you're tracked. And the call recipient is tracked. Is that OK in your scenario? If not, you need multiple devices, multiple SIM cards and multiple plan PINs for each call.
I agree that once the first call is made that phone number and phone is now trackable. In my hypothetical scenario only a few calls would be necessary. However if used properly, those calls are still not associated with my personal identity. Am I understanding this last part incorrectly?