Not in the normal photographic sense. Wi‑Fi and mobile-phone signals are radio waves with much longer wavelengths than visible light. For example, 2.4 GHz Wi‑Fi is about 12.5 cm wavelength, so achieving useful spatial resolution requires antennas/apertures that are large relative to that wavelength. That makes a normal handheld "camera" impractical for everyday scenes.

This is why radio imaging is usually done with very large systems, such as radio telescopes, to image very large subjects.

That said, there are experimental and computational ways to visualize radio signals. Using antennas, receivers, and software, researchers can reconstruct coarse images or depth information from Wi‑Fi reflections and multipath. These systems are not conventional cameras with lenses and sensors like visible-light cameras, and the resulting images are typically low-resolution and heavily processed.

So the short answer is: not as a standard consumer camera, but yes, radio-frequency imaging/visualization is possible with specialized hardware and computation.