There are also IMSI Catchers intercepting GSM all over the USA, for example this... | Hacker News

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		dmix on Nov 13, 2014 \| parent \| context \| favorite \| on: Americans’ Cellphones Targeted in Secret U.S. Spy ... There are also IMSI Catchers intercepting GSM all over the USA, for example this twitter feed reported one at SFO airport recently: https://twitter.com/cellhacking/status/524562944928264192 And all over Washington DC: https://twitter.com/esdamerica/status/512293117052334080

larakerns on Nov 14, 2014 [–]

There are now a few Android apps in development to keep track of the towers your devices use day to day to hopefully detect rogue IMSI catchers.

This one is the most promising: http://signup.spideyapp.com/

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