Exploring the Spectrum: GSM Field Test Mode & Phonecall
In this video, we demonstrate placing a phone into field test mode to find out what GSM uplink frequency it has been allocated, and tune an RTL-SDR and a professional spectrum analyzer to this frequency to watch what happens when a phonecall is made.
We invite you to view more at http://www.desktopSDR.com, where you are able to download a free copy of the book and its support files.