I completely disagree with the author of this article. The nuclear power plant that was taken offline by Stuxnet in Iran was not connected to the internet..... furthermore, most critical systems (as one reader commented) are in fact connected to the internet via one means or another - either by oversight, ignorance, or both. The fact remains that you are vulnerable regardless of internet connectivity, and the situation is worsened by SCADA vendors who don't patch their code, even when vulnerabilities are announced publicly. The cybersecurity capacity of the United States is woefully inadequate, particularly in the area of critical network defense. Not sure about you, but I'll put my tinfoil hat back on now....

it doesnt brick the phones, it just re-locks them... doing this would make the phone unusable in the UK, but definitely not "bricked" in the classical sense.