
Using only Short Message Service (SMS) communications—messages that can be sent between mobile phones—a pair of security researchers were able to force low-end phones to shut down abruptly and knock them off a cellular network. As well as text messages, the SMS protocol can be used to transmit small programs, called "binaries" that run on a phone. Network operators use these files to, for example, change the settings on a device remotely. The researchers used the same approach to attack phones. They performed their tricks on handsets made by Nokia, LG, Samsung, Motorola, Sony Ericsson, and Micromax, a popular Indian cell-phone manufacturer.
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