On Saturday, October 8, 2016 at 3:46:07 AM UTC+13, Dan Marotta wrote:
It would be interesting to look at the emissions of your phone with a
spectrum analyzer. We're not talking just the telephone signal here,
there are so many other electronic gizmos inside that little box that
could be putting out spurious radiation.

I have one :-)

http://rf-explorer.com

With the 240-960 MHz and 15-2700 MHz modules.

I've found it very useful for everything from verifying transmit power on glider radios, to checking for unused WIFI channels, to ...