According to the article any chip after Sandy Bridge has this 3g backdoor? I very technically minded about these things but is this even possible? I would say yes, especially after all the whistleblowing about the NSA prism program.
http://www.prisonplanet.com/secret-3g-intel-chip-gives-snoops-backdoor-pc-access.html
http://www.prisonplanet.com/secret-3g-intel-chip-gives-snoops-backdoor-pc-access.html