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Custom SIM card in Tesla Model 3 2024, Tesla Model Y 2025 and Cybertruck
All Tesla vehicles are equipped with eSIM or built-in SIM cards that provide 4G/5G connectivity for the car. This Tesla SIM works only on official markets and is useless in “gray” areas.
Previously, I explained how to replace the LTE modem and install a local SIM card on the original Tesla Model 3. Local connection requires access to the car’s diagnostic connector, which is on top of the driver’s footwell, and a special OBD-to-Ethernet cable. The native Tesla mobile application wakes the car by sending an SMS to the internal SIM card number.
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