Interestingly, the thieves seem to have some kind of inside track to the workings of the high-tech JRA. Not every light in Johannesburg is wired in this way, and the ones that aren't look just like the ones that are. Yet the thieves invariably target the lights with the valuable SIM cards inside. A spokesman for the JRA says, "They know which signals to target. They clearly have information." Each of those lights--more than two-thirds of the 600 high-tech lights have been hit--costs over $3,000 U.S. to repair, and some have been hit after they've been repaired already. The spokesman said they've cancelled the SIM cards and is now working with both its tech suppliers and the Johannesburg police to try to combat the crimes. They're also conducting an internal investigation, in case somebody inside the JRS is working with the thieves.