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A comment on Ask HN: Why are SIM cards still a thing?. Parent comment

Re:Ask HN: Why are SIM cards still a thing? by Laforet on Sunday October 30, 2016 @07:54PM (#12833282)
They already have control of all your traffic so what's the harm? Take the sim out of your phone in case you are really worried, but that would cut you off the network as well.

I'd be far more concerned with the hundreds of microcontrollers running proprietary code.

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Re:Ask HN: Why are SIM cards still a thing? by colechristensen on Sunday October 30, 2016 @08:20PM (#12833402)
The SIM, being a physical piece of hardware plugged into my phone, could easily be used as an attack vector for my phone company to root my phone. Hardware plugged into my phone is a much more vulnerable attack surface than control of network traffic.
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Re:Ask HN: Why are SIM cards still a thing? by EvanAnderson on Sunday October 30, 2016 @08:53PM (#12833523)
The baseband is already at the beck-and-call of your telco provider and has much better access to the hardware than the SIM card.
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Re:Ask HN: Why are SIM cards still a thing? by infinity0 on Sunday October 30, 2016 @08:59PM (#12833546)
The point is your phone (if it were secure enough) could treat your SIM card like any other untrusted device accessory, and only let it do stuff it's allowed to do.

[network] <-> [phone] <-> [SIM card]

In theory. Not sure how well practise matches this though.

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