Mobile Phone SONAR !
A mobile phone is a powerful AWARENESS TOOL that can tell you the PRESENCE of somebody. Yesterday, I was wondering whether my friend Elise (who was in Italy for holidays) was back in France or not. I sent her a SMS. My Nokia Phone receives reports to tell me whether the SMS is delivered or just pending. The meaning could be interpreted like this :
SMS delivered : she's back in France (I know that she did not take the internation option) Pending SMS : she is still in Italy or she is in France and her cell phone is off.