I am a person who does not want surprises. Even with the use of my cell phone, I would never answer calls or text messages coming from unnamed sources or from one who was not registered in my phone contacts. There was one time however that someone was calling me for consecutive number of days. It was a landline number that was not registered on my directory. I ignored all the calls and text messages because I did not have any idea who that person was. I was with a friend when he noticed that I was ignoring the call. I told him my reason for ignoring the call. He said that I could get the details of the caller without the latter knowing it. My friend introduced me to reverse cell phone lookup and I was surprised that it was my old friend who was calling me all the time. The next time he called, I already answered his call.