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The one thing that's not redacted is the existence of a 2100 MHz converter. I guess that suggests UMTS support rather than only GSM, which means they've either broken the authentication UMTS terminals do of the network or they have the full cooperation of the network operators.

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They (NSA, GCHQ) stole many SIM card authentication keys, so they can probably eavesdrop on UMTS conversations with them: http://electrospaces.blogspot.com/2015/02/nsa-and-gchq-steal...

There currently is no need to use stolen SIM card authentication keys.

They have full cooperation and it is definitely not just GSM.

What I always wondered was, if they have full cooperation, why do they even need hardware? Can't they just get access to tap the communications centrally? Would be far easier.

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