A method and system providing an advertisement using a tone of ringing sounds of a mobile phone terminal, and a commercial transaction service in association with the same, is provided. An advertisement is output instead of an incoming call ring sound which rings when a user of the mobile phone terminal...http://www.google.com/patents/US20030050837?utm_source=gb-gplus-sharePatent US20030050837 - Method and system providing advertisement using tone of ringing sounds of mobile phone and commerical transaction service in association with the same
