Unfortunately it’s not quite as simple as just soldering on a four-wire USB cable. The modem relies on the ... which pins are used to talk to the SIM card, and soldering them up to a SIM ...

[Oleg Kutkov], being an experienced engineer, didn’t fret when an USA-tailored LTE modem ... SIM card on some extender wires has proven fruitful. The resulting Tesla can now enjoy Internet ...