NEW YORK (AP) - Wendy's is rolling out a program that lets customers pay using their smartphones, following a similar plans unveiled by Burger King this week. The Wendy's Co., based in Dublin, Ohio, has been testing the mobile payment option over the past year and said the majority of its roughly 5,800 U.S. locations are now ready to accept the payments. The move reflects a push by fast-food chains to court younger customers by tapping into the attachment they have to their phones. Burger King Worldwide Inc. also said this week it would introduce a mobile payment program at its U.S. restaurants in April. McDonald's Corp. has acknowledged the importance of mobile payments but is still in a testing phase.