Cellular Modem TEMPEST

[John Young]

Last summer World Net Daily published an article on
a hacker group called "Hong Kong Blondes" in which
the hackers claimed  that compromising electromagnetic
emanations from computer equipment could be acquired
by cellular modems. 

Can cellular modems be used for this purpose? If so,
what is involved in setting them up for it?

Here's the article excerpt:

  As time progressed, members of the Hong
  Kong Blondes leadership told WorldNetDaily
  they began actually to install codes within the
  PLA computer mainframes. By using cellular
  modems, they were able to monitor the
  electromagnetic signals emitted by PLA
  computers by remote means. The Blondes even
  planted transmitters within the offices of the
  Chinese government, People's Liberation Army
  and foreign corporate headquarters in order to
  monitor their activities and infiltrate their
  computer networks.

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