Contrary to popular misconceptions, it's not possible to truly “see through walls” with a smartphone in the way often depicted in movies. Walls are solid barriers that block visible light, and a regular smartphone camera has no means of penetrating them. However, certain technologies can offer some insights related to what's behind walls, but they have significant limitations.

One approach involves using external accessories connected via your phone. A usb c thermal camera can detect infrared radiation emitted by objects. When pointed at a wall, it can show temperature differences on the surface. For example, if there are pipes or electrical wires behind the wall that are at different temperatures than the surrounding wall material, the thermal camera may highlight these areas as temperature anomalies. But it doesn't actually show a clear visual image of what's behind the wall; instead, it presents a heat map that indicates where heat sources or areas with different thermal properties are located.

Another option could be an ir usb camera. Infrared cameras detect infrared light, which can sometimes reveal information that isn't visible to the naked eye or a normal camera. In some cases, if there are large objects behind a thin wall that absorb or reflect infrared light differently from the wall itself, the ir camera usb might show subtle variations in the infrared signature. However, this is far from a clear view of what lies behind the wall. It's more about detecting general patterns and differences in infrared emissions rather than seeing detailed objects or people.

In reality, even with these tools, seeing through walls remains a complex and imprecise task. The thickness and composition of the wall, as well as the type of objects behind it, greatly affect the results. Additionally, privacy laws and ethical considerations come into play, as using such devices inappropriately to peer into private spaces is illegal and unethical. So while external usb c thermal camera and ir usb camera accessories can offer some limited insights related to what's behind walls, they don't provide the clear, detailed “x - ray vision” that many people imagine.