Comment What airgap? (Score 2) 213
It doesn't matter. Either there's an airgap, where nothing can get out regardless, so it doesn't matter, or their's a hop along the path you don't control so the security of your device doesn't matter.
If you have an Intel processor, then there is already a radio backdoor built in. See http://www.intel.com/content/www/us/en/enterprise-security/what-is-vpro-technology-video.html