We need one that fits entire cars now. The amount of surveillance tech that comes standard in vehicles today is borderline criminal.
just gotta avoid buying shitcoin vehicles
@ChipTuner mentions 2014 and earlier are not guaranteed to have telemetry
You need to drive an old car! And new cars should not have all this shit. That is the main Solition. Same on Phones, first you need a trusted device, than you can add a shield. You can drive an old Car but i know no Smartphone i fully suggest. I would suggest to use a mobile pc instead, but this is not comfortable, because of this i use a Google Pixel with Graphene OS and use flightmode but WLAN on.