Secret SIMs, also known as white SIMs or Russian SIMs, are marketed as if they can never be tracked or monitored by the police.
Is this a sign that SIM swappers have started to target VIPs?
Al Jazeera’s Investigative Unit used hidden cameras to record the criminal dealings of tech suppliers that sell IMSI-catchers and other tools that invade people’s privacy.
The external appearance of the device made by conceptual artist Julian Oliver gives no hint of the trickery which lies inside.
Oxford academics found two privacy flaws which allow WiFi devices to track mobile phones.
Sky News used technology from a German security firm to detect at least 20 IMSI-catchers over a period of three weeks. The Police neither confirms nor denies ownership of the IMSI-catchers.