So wireless operates on 2500 ghz (or 5000 ghz) but cellphone GSM
operates on much lower frequency (or larger wavelength), hence travels
greater distance.

I'm seeing each country has a different GSM frequency, some countries
have something like:

  United Kingdom    GSM 900/1800

What does that mean? Do cellphones use both frequencies or hop between them?

What's the typical range of a directional antenna (say 23 dBm) with line
of sight?

I found also this really good tutorial on the internet:

http://www.rtl-sdr.com/rtl-sdr-tutorial-analyzing-gsm-with-airprobe-and-wireshark/

linux rocks!

On 11/08/2014 01:31 AM, Amir Taaki wrote:
> Hi!
>
> How can I see mobile phone signals on Linux? I have a yagi and omni
> antennas for wifi signals... Can I also use this for cell phone signals?
>
> I am interested to learn more. Especially about triangulation of signals
> for detecting cell phone locations.
>
> Thanks.
> (the previous topic was very informative and instructive... thank you
> everyone who responded. The EFF link was very good and the open hardware
> stuff is cool too)
>
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