Truecaller app is one of the famous app to identify the unknown numbers and known the correct name and place of the person calling u. I am using this in my android phone. now a days some fraudsters r calling us trying to grab our recharge without knowing to us. means once I got a call from unknown number and I lifted it any my bal of Rs.110 is completed in just seconds.
Then I opend true caller app and found that the number is from foreign and used by fraudsters. so u can use this app even to find out and also block those unwanted numbers and protect ur personnel info from fraudsters. from then I am not lifting any unknown calls and after checking it in true caller then I am calling. I can suggest u this good app.