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by harshreality 4581 days ago
Details: http://electrospaces.blogspot.com/2013/04/how-obamas-blackbe...

SecurVoice software by Genesis Key, a short list of contacts that also have compatible communications devices (unclear if that's required or if that's only for classified communications, since a photo caption has Obama calling Romney), and possibly other hardware or firmware modifications that are not disclosed. IMEI kept secret, and the phone might only connect to a special secured base station.