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"They have always-on modems."

Who pays for the cellular data plan

"Important: Even after the modem is removed, if you connect your phone to the car via Bluetooth then the car will use your phone as an internet connection and send all the same telemetry data back to Toyota."

Thats quite sneaky. On by default, no option to disable

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I wonder if you could repurpose the cars SIM card (eSIM or otherwise) / cellular modem for your own use? Like presumably the manufacturer is paying a data plan to a cell provider. If the connection is not locked down to specific traffic I wonder if it could be reused

but is it true?

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