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iPhone 14 Pro

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If Tesla offered an official Apple Watch app that could work as the key, I wouldn't carry a wallet at all.
I carry a minimalist card holder, for just a few credit cards, drivers license, health insurance card and such. So for me it's no problem to keep my Tesla key card in there too. Oh and any cash goes in my pocket, yes I carry some cash, for tipping servers.
 
Twice in 4 years the app didn't work, deleting and reinstalling the app fixed it once and the other I had to delete my phone from the car and enter it back in. These are just a few of the issues with driving a software based vehicle.