Well! when service provider get a call from impersonator asking for the "number" , all they have to do is before giving the number to a caller, hang up the phone and call back to owner of the number and ask if they just called. its simple. cant they do that??
Well! when service provider get a call from impersonator asking for the "number" , all they have to do is before giving the number to a caller, hang up the phone and call back to owner of the number and ask if they just called. its simple. cant they do that??