[ Just buy a burner phone from Walmart and call away. In fact, you can get all of your more unpleasant phone calls done that way. ]
And buy the damned thing with CASH! and store it in a faraday cage when not using it and remove the battery when not using it and only use it after driving down the road a bit.
I am THAT paranoid!
Not that I used to be, but after all the shenanigans that Obamugbe has pulled I am NOW!