Here is another useful Java application Mobile Number Tracer for Indian mobile users only who own Symbian touch screen mobiles. The application is a free mobile number traker. It gives you information about any mobile number in India.
You need to provide first 4 digits of the mobile number you want to track. After that click on Fetch button and application will display the information such as service provider of the mobile number, state and city of the number. The results are instant.
Along with number tracker, there is another functionality of finding the STD code of any city in India. You need to enter the name of the city and it will display the STD code of that city. The application is developed by Killer Mobi.
Note: Make sure you off the on-screen keyboard before launching this application on your mobile to open it in full screen.