It's also posted in the car when the phone key is added. In my case, the handover agent specifically told me to keep my key card with me. It's not really a secr

It's also posted in the car when the phone key is added. In my case, the handover agent specifically told me to keep my key card with me. It's not really a secret, nor is Tesla saying you should only use your phone as a key and nothing else. Tesla's marketing is that you can use your phone as your key - and they're right, and it's also very convenient. It's not the same thing to say that users should only rely on their phones. They can't anyway, since the car will require the key card when adding a phone.