Boycott all new vehicles that are incapable of making a simple phone call. If a car costs over 25,000$ and it can't make a simple phone call, it is a piece of junk. A cheap phone is like 20$..
I'd rather have my own phone I chose on the contract I chose rather than a car manufacturer forcing me to pay a high monthly fee for calls and data I already have.
My car connects to my phone now via Google drive and the display is mirrored on the cars display. It works well (except Google maps not understanding UK b-roads are often not suitable!
Besides, that point, your vehicle probably already has a phone in it, the government just does not want you too know they are spying on you in your own vehicle.