Every person whether male or female directly or indirectly fed up with unknown callers, its easy for every person to afford mobile but its hard to assist any stranger call , Low call rates are also responsible for increase in the number of strange calls .
There are only few services that helps you in detecting unknown cell phone numbers and you can use all these service to trace location of any mobile number without any cost.
Trace Mobile(http://m.vevin.com/mobile/) help you in tracing location of any mobile number in Indian without charging any cost.
Tp2location(http://www.tp2location.com/) Is best for tracing any cell phone number ,They also help you in tracing international mobile number.
Bharatiyamobil(http://trace.bharatiyamobile.com/) service for tracking mobile numbers if you are facing problem in learning all such codes.
Information Madness(http://www.informationmadness.com/cms/index.php?option=com_search_misscall&Itemid=124) for tracking mobile numbers of both India and Pakistan.
Hacktrix(http://www.hacktrix.com/trace-mobile-phone-location-and-service-provider-details/) – You can also try Hacktrix mobile tracing service to trace mobile location.