So there are places and times where the laws of physics break down and the supernatural and natural merge ( sortof a mix of how in GOT the power of magic waxes and wanes, and the convergence of spheres from the Witcher) most of most of modern history these bubbles of supernatural power have been small. Then one of these bubbles opens on the west coast of the US. In a 5 mile radius everything using a transistor will receive phantoms signals practically at random this quickly corrupts data stored in a device and signals sent from one device to another. Radio signals also receive extreme amounts of interference making them difficult to use to communicate. Scientist and Scolars come from across the globe to gawk at the impossibility of it. Beyond making it impossible to use a computer of any kind, or radio you wouldnt be able to tell much of a difference standing inside. Over time the area of effect expands and continues to grow.