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A comment on Supreme Court to Hear Case on Cellphone Location Data. Parent comment

Re:Supreme Court to Hear Case on Cellphone Location Data by r00fus on Monday June 05, 2017 @12:43PM (#14489041)
Another consideration: how can one challenge this evidence on-par with an hope of success? I imagine personal records showing discrepancies or outright fabrication on the carrier's part would not easily be accepted.

Finally, the carrier was provided, but the phone itself wasn't identified. Was this a dumb phone, Android or iOS device? Does it matter?

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Re:Supreme Court to Hear Case on Cellphone Location Data by joecool1029 on Monday June 05, 2017 @02:52PM (#14490262)
>Finally, the carrier was provided, but the phone itself wasn't identified. Was this a dumb phone, Android or iOS device? Does it matter?

It does not matter. Every carrier maintains a list of connected to towers for a month or more. This is the data those companies would be providing to LEO.

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Re:Supreme Court to Hear Case on Cellphone Location Data by ubersync on Monday June 05, 2017 @02:54PM (#14490284)
Another consideration: How easy is it to spoof a sim card? Someone might be trying to implicate the accused by duplicating their sim card and taking a phone with the duplicated sim card to every robbery they commit.
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Re:Supreme Court to Hear Case on Cellphone Location Data by joecool1029 on Monday June 05, 2017 @03:48PM (#14490935)
> Another consideration: How easy is it to spoof a sim card?

Spoof? No. You can clone a card if you get physical access to it and it uses the older COMP128v1 encryption as the key is just 56-bit to bruteforce. This allows you to use their IMSI.

You'd also need to spoof the IMEI of the target device, which can only be done easily on older phones (original iPhone with early baseband is one) or with custom built solutions (think SDR, hackrf stuff)

I am fairly certain most major US carriers are not using the old-style SIM card anymore for this very reason. To support 3G and later on LTE, the cards would have to be upgraded.

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