Pentagon official: FCC decision on 5G threatens GPS, national security
I don&#x27;t think there&#x27;s enough detail here to decide whether or not to be mad.  The L band is huge, 1000MHz-2000MHz.  GPS uses a few tiny slices of this band.  Cell phones, amateur radio, weather radar (though not precipitation-detection radar), ADS-B, and a ton of other non-military things are in that band.  Adding 5G may or may not have any negative effect on GPS.  I doubt they are proposing to run their 5G network on top of the GPS frequencies, after all, because everyone knows that would break GPS (which already operate well below the noise floor).<p>One time when we were working on testing Wifi interference, we tried to buy every possible 2.4GHz device to see what they did to our routers.  We found these TV extenders (connect camera to one end, connect TV to the other) that claimed to be 2.4GHz but didn&#x27;t interfere at all.  We looked more closely with a spectrum analyzer and they were actually 1.3GHz and completely stepped all over the GPS frequencies.  Did the FCC stop Amazon from importing these things?  Nope.  I guess my point is... the threat is real, but someone going out of their way to request permission from the government (as is legally required) is probably not going to cause many problems.