Build GSM Signal receiver ?

i want to build device that only find GSM signal...I do not need processing signal's .i Just want to know whether the device is in GSM signal reception and receive this signal??

So all you want is a GSM sniffer? Don't know what good that will do since GSM is everywhere. The only info you will get is that there is a good or bad GSM signal near you.

Have you looked at the option presented in the instructables on the right hand side of this page.
dj_mina (author)  mpilchfamily4 years ago
I think following post can help me
https://www.instructables.com/id/Understanding-How-AM-Radios-work/step7/The-Detected-Signal/
dj_mina (author) 4 years ago
they are tracker and remote controlling system..i just need to sniff signal!
dj_mina (author) 4 years ago
i want to test my mobile that when it send GSM signal