How Tiny Swiss Cellphone Chips Helped Track Global Terror Web (2004)
nytimes.com
nytimes.com
Did they not have SIMs in the US in 2004? The article takes an awful long time to identify these 'chips' explicitly as SIM cards, as if the intended audience wouldn't known about them.
Now, with LTE, that's changing a bit.
It seems weird that a leader in an organization capable of executing the 9/11 attacks could have lacked such basic understanding of how cellular technology works. There wasn't a single guy in al Qaeda who knew that a SIM card was a unique identifier?