Smart phones

Smart phones freak me out, I don't like the thought of someone being able to track me down, simply because my cell phone is on. My father recently bought my younger brother and sister who are 8 and 9 respectively new cell phones. Honestly I was pissed, but i got a shocking response when I approached him about the situation. He said that in each of the phones there was a tracking device in which he could see exactly where my brother and sister are located at any given time. I am so glad these were not invented when I was younger.