What is AT&T doing at 1111340002?
Even in relatively technical circles, like HN, many people are not aware of this and I use every opportunity I have to reiterate:<p>A SIM card is a <i>full blown computer</i> with its own CPU and memory.<p>Your carrier can upload and run <i>arbitrary code</i> without your consent or knowledge.  They can do this at any time.<p>This means that your "phone" is actually <i>three</i> different computers running in concert - the actual phone itself (iOS or Android or Symbian), the baseband processor running the baseband code, and the SIM card.