is there a heavy metal version of the wedding march?
yes ofcourse in examination halls mostly it is useful to detect cell phones from students
Is there any metal in said phone? Probably a little
yes, metal detector is used to detect metals, there are metal parts inside the cell phone
Likely a metal detector can detect a cell phone if close enough but not the transmission of a cell phone. By chance and not design, the electronics of a metal detector may pick up the transmission of a cell phone in close proximity as interference. My sister once had an ordinary record player that picked up taxi cabs!
