A robo call that starts with " Do not hang up.  This is not a sales call.". The message then goes on to say crime rates are rising and you have been referred by a friend or neighbor for a free home security system.  The message later gives you the option to press 2 to receive no more calls and press 1 for more information.  The recording then says if you press 1 you  are giving them permission to call back.  I press 2 as  I always do, but the calls continue, though they come from different  numbers.