US uncovers 100,000 SIM cards that could have “shut down” NYC cell network

According to the US Secret Service, it has located and seized a cache of telecom devices large enough to shut down the cellular network in New York City, and believes a nation-state is responsible. The agency says more than 300 co-located SIM servers and 100,000 SIM cards were discovered at multiple locations within the New York City area, with photos showing “SIM boxes” bristling with antennas and packed onto six-shelf racks.

The seized equipment was found as part of an investigation into anonymous telephonic threats made against several high‑ranking US government officials, but the setup appears capable of far broader disruption. Analysis described by the report suggests the system could have activities such as disabling cell phone towers, enabling denial of service attacks, and facilitating anonymous, encrypted communication between potential threat actors and criminal enterprises; however, the ultimate purpose remains unclear.

The gear has been taken offline, and while the investigation continues, no arrests have yet been made, with sites located up to 35 miles from the UN.