More than 200,000 payment locations in the U.S. are equipped to accept so-called contactless payments, including Apple Pay. Smaller merchants tend to be among the several millions that don’t have the required equipment yet.

Apple said it has worked with several retailers to make sure most of their stores, if not all of them, were ready at Monday’s launch: Aeropostale, American Eagle Outfitters, Babies R Us, BJ’s Wholesale Club, Bloomingdale’s, Champs Sports, Chevron and Texaco retail stores including ExtraMile, Disney Store, Duane Reade, Footaction, Foot Locker, House of Hoops by Foot Locker, Kids Foot Locker, Lady Foot Locker, Macy’s, McDonald’s, Nike, Office Depot, Panera Bread, Petco, RadioShack, RUN by Foot Locker, SIX:02, Sports Authority, Subway, Toys R Us, Unleashed by Petco, Walgreens, Wegmans and Whole Foods Market.