I was sitting in class and my I-phone signaled an unexepected incoming phone text message from a friend in the room. This person did not know my phone number or anything, and yet they were able to send a text message to my I-phone from their I-phone, and they would not tell me how. How is this done? My Bluetooth switch was 'off', by the way. I am concerned now that he can access my other stuff on my phone just be being nearby. He said he is able sometimes to look at other text messages on nearby phones, including photo attachments, etc. He said it was not a special app, just something you can access on your phone. Is this true? What is going on? I would really appreciate someone explaining it... Thanks in advance.