McDonald’s customers in Utah can score a free iced coffee when they use mobile coupons from San Jose, Calif.-based Cellfire at participating restaurants.

The promotion will run until April 27, as part of McDonald’s new iced coffee beverage launch. It’s good at participating restaurants throughout Utah, western Wyoming and eastern Nevada. No purchase is necessary.

Consumers that download Cellfire to their mobile phones will receive the free offer and any future offers by participating McDonald’s restaurants.

Cellfire’s service automatically delivers coupons to wireless subscribers via SMS. They can access the message on demand to discover and use discounts specific to their geographic area. Users are provided with a redemption code that is shown at the time of a transaction.  Users click on the coupon they want to use and show it to the sales clerk for redemption.