Although the likelihood of a cell phone being struck by lightning is low, it does happen occasionally, and it is more likely to occur as a result of the person using the phone being the tallest object in the vicinity when lightning strikes than as a result of the phone itself. In the event of an electrical storm, cell phones (and cordless portable phones) used indoors are completely safe because there is no wire through which the electric discharge could pass. In fact, the notion that lightning can track radio frequencies is utterly incorrect. In addition, there is a widespread notion that cell phones represent a risk when used outside due to the fact that lightning is drawn to metal, despite the fact that handsets typically contain negligible amounts of metal.
Frequent flashes of lighting and thunder