A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.

These two ways of connecting your phone to a cellular network are very different. We tell you about each and how you can switch from one to another.

When traveling internationally, staying connected often requires a bit of planning. One solution a lot of travelers consider ...

More than 300 SIM servers and 100,000 SIM cards were seized to stop the imminent threat to protective operations. One network was said to be capable of sending 30,000,000 texts per minute.

CNN chief law enforcement and intelligence analyst John Miller and CNN law enforcement analyst and former Secret Service agent Jonathan Wackrow addressed six key questions related to the investigation ...

The rogue cellular network spanned '100,000 SIM cards across multiple sites,' and was used to make fake calls to US officials, including swatting threats.

Europol on Friday announced the disruption of a sophisticated cybercrime-as-a-service (CaaS) platform that operated a SIM ...