Telephone Listening - Part 1: Frequency Detection RTL-SDR

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Telephone Listening - Part 1: Frequency Detection RTL-SDR

Greetings In this video, we started the gsm listening series using the RTL-SDR device, and in this section, we
will
scan the GSM900 band and detect the frequency.​


Priorities RTL2832U R820T Any RTL-SDR Device with a chip doesn't matter, any generation of

Linux-based operating systems will work. I continue with kali We
open the terminal and enter the following commands and finish all the installations gr-gsm installation may take a long time
Code:
root @ kali: ~ # pip install PyBOMBS
root @ kali: ~ # sudo apt install python-numpy python-scipy python-scapy
root @ kali: ~ # pybombs prefix init / usr / local -a default_prx
root @ kali: ~ # pybombs config default_prefix default_prx
root @ kali: ~ # pybombs go to recipes add gr-recipes + http: //github.com/gnuradio/gr-recipes.git
root @ kali: ~ # go to pybombs recipes add gr -etcetera + http: //github.com/gnuradio/gr-etcetera.git
root @ kali: ~ # pybombs install gr-gsm
then we install GQRX and complete the installation.

Code:
root @ kali: ~ # sudo apt-get install gqrx
After entering this code, we are finished to make frequency detection.

Just open the terminal and enter the following command.

Code:
root @ kali: ~ # kal -s GSM900

336


As you can see in the picture we caught the frequency.​

0AGVGb.jpg