In case of an SMS Competition, the consumer takes part in the competition simply by sending an SMS to a dedicated number, which includes all required details for the specific competition (i.e. the unique game code, receipt details, key word, answer to a specific question, etc.).
Generally speaking, SMS competitions combine very well with Instant Win mechanics, where, following validation of a text message which has been sent, the software allocates winnings randomly. In the event of a winning, consumers receive immediate notification, again by means of a text message.