Abstract: This invention concerns a method and computing system for game, lottery and advertising campaign events in order to encourage the use of chained SMS or Multimedia messages where the sender, responsible for supporting all associated costs, becomes eligible for winning randomly awarded prizes set according to predetermined rules, using the cellular phone channel, in theory, reaching all cellular phone users, without breaking any mobile network service operator database privacy. It is characterized by: The use of a network computing system, connected to the mobile network operator numbers, who receive cellular phone messages and forward them to a computing system management platform.