There is a key distinction between jamming a radio signal and cutting a wired communication, but most people are not fully aware of this difference. This confusion has led to one of the most widely shared tips in recent years: wrapping one's Linky meter in aluminum foil in an attempt to stop its transmissions. The idea is appealing because of its simplicity and the almost reassuring, do-it-yourself quality it offers. However, a closer look at the technology behind the Linky meter reveals that this method is based on a misunderstanding. The Linky meter sends its data through power line communication, which uses the electrical cables in a home to transmit information, rather than through aerial radio waves. Therefore, wrapping the meter in aluminum foil, which is meant to block radio waves using a Faraday cage principle, has no effect on this wired signal or the meter's regulated radio emissions. The belief that wrapping the Linky meter in aluminum foil would work comes from a comparison with other connected devices like internet boxes or telephones, which do use radio waves captured in the air. Many users, concerned about their health or wanting to maintain digital peace, have applied what seems like logical reasoning: creating a makeshift Faraday cage to block the waves. This principle is used to protect sensitive electronic devices from interference. However, the reasoning overlooks a crucial detail: the Linky meter does not emit its data through radio waves passing through walls. Instead, it uses a technology called power line communication (CPL), which sends information directly through the electrical cables already in the home. In practice, the meter's consumption data travel along the same path as electricity, superimposing on the current that powers outlets and devices. This signal moves within the home's wired network, not through the air. As a result, wrapping the meter's housing in aluminum foil has no effect, since there is no signal to intercept outside the cable. It is like trying to stop a river's flow by holding an umbrella over a bridge. This incident highlights a growing distrust of connected devices that enter homes without people fully understanding how they work. It is important to remember a few key points before following a viral tip that lacks technical foundation: the Linky meter sends data through power line communication via electrical cables, aluminum foil has no effect on this type of wired transmission, and the meter's regulated radio emissions are not blocked by this method. For those who still wish to express concerns about the Linky meter's installation, there are official procedures to follow with the network manager, which are far more effective than this DIY approach. Consulting reliable sources remains the best response when dealing with misunderstood technology. This story of aluminum foil serves as a reminder of how technology can sometimes appear misleading. Before following a tip circulating online, it is better to understand how the device actually works, rather than relying on an attractive but incorrect intuition.