No output from kalibrate-hackrf

[msfu101]

No description provided.

[msfu101]

Hi there,
if i type: kal -s GSM900
it gaves me the Output: kal: Scanning for GSM-900 base stations.
After a while it closes itself and went back to root Terminal.
Hackrf is fully installed and Gnuradio8 works fine. But what is up with kalibrate? Even my IMSI-catcher gives me no Output...
What can i do now?

[jbelinchonm]

It could be due to poor signal reception. To make progress you have to find more information:

• Run with verbose option.
• Check other GSM bands that are in use around you.
• Use a proper antenna
• place your receiver in the best receiving location posible.
• You can check GSM antenna your iPhone is connected to by using a debug call code like *3001#12345#*
• There are several online databases available and mobile apps to find the nearby stations
  
• Run first fm_tuner over the desired known frequency, as it is much more error tolerant than kal.

Good luck