SMS is a carrier feature, and travels over the voice network channels. These have been hacked before, and the carrier network is very weak in encryption (prior to 4G/LTE). There have been instances where control commands were injected to the carrier network and it would shut off the mobile radio on a device, or cause it to reboot, etc. This has been used on a BlackBerry as well as other smartphone devices. I would not be surprised if the carrier was the weak point here in this whole SMS debacle.
SMS is a carrier feature, and travels over the voice network channels. These have been hacked before, and the carrier network is very weak in encryption (prior to 4G/LTE). There have been instances where control commands were injected to the carrier network and it would shut off the mobile radio on a device, or cause it to reboot, etc. This has been used on a BlackBerry as well as other smartphone devices. I would not be surprised if the carrier was the weak point here in this whole SMS debacle.