True caller application
True caller app was first founded by Sweden enterprises. The story must start from the login screen. If you have already used Truecaller, you might have seen that Truecaller only allows either Facebook, Yahoo! or Gmail to access Truecaller app. If you don't have one you not connect to Truecaller database. This is because, Facebook, Gmail and Yahoo! are the most widely used social networking sites that contain a lot of phone numbers and other contact details. It implies that when you use one of the social sites, your entire contacts including phone numbers, contact names, email ids will be uploaded to a secure Truecaller server. Disadvantage of using truecaller application