GSM Decoding Part 6: Extracting Voice Call Audio With 'grgsm_decode'

Ever since I associated an email address with my YouTube channel back in February of this year, I have been inundated with emails requesting help with decoding GSM data and questions about the usage of gr-gsm.

So in response to this, I thought I would put together a four or five part video tutorial series on how exactly GSM cellular data is decoded in Linux with the gr-gsm software suite.

Well, we're up to part 6 now and the series is going longer than expected. But the subject of the video pertains to the holy grail of GSM decoding, voice call interception.

No hardware is required, excluding a working PC. Please refer to part one for a comprehensive list of the software needed for this tutorial. The only additional pieces of software needed are Wireshark and VLC Media Player.

Stay tuned for part 7 in the coming days or weeks, where I will be demonstrating how SMS messages can be extracted from GSM data capture files.

Thanks for watching!