There’s currently a Nigerian and an American who are within my neighborhood at the moment or passing around😂. During my radio and signal hacking research, I could tell the identity of everyone in my area because their mobile phone is on. This program shows you IMSI numbers, country, brand and operator of cellphones around you. I made this research for people to understand how GSM network work. IMSI is very powerful; as stated by EDWARD SNOWDEN years ago on his expose on surveillance. Anyone who has your IMSI can track you, listen to your calls or intercept your SMS. Your mobile phone always connects to the nearest available cell tower for service. This is fundamental to how mobile networks work for calls, texts, and data to flow. Any attacker with correct tools can mimick the cell tower; this is why SS7 vulnerabilities can’t be patched. Law enforcement agencies often utilize IMSI catchers as part of their surveillance operations, especially in scenarios involving public demonstrations or high-security events. These devices allow authorities to identify and track mobile devices within a targeted area by mimicking legitimate cell towers and capturing the International Mobile Subscriber Identity (IMSI) of nearby phones. This capability enables them to retroactively identify and locate individuals present at specific times and locations. Now the power is also in the hands of cybersecurity professionals and not only the law enforcements. Advanced software-defined radio (SDR) tools such as BladeRF and HackRF are also capable of similar signal interception techniques, making them powerful instruments in radio frequency (RF) reconnaissance and hacking. This is an educational research. Later this year, I’ll give you a more comprehensive research work on why it is very difficult to patch signal vulnerabilities.