(Mandy Jansen) Now that nearly every American has a smartphone permanently fixed to their hand, a long list of restaurants including Starbucks, Dunkin’ Donuts, Taco Bell and Dominos have upped their mobile presence by way of ordering and payment apps, and now one of the largest chains in the country is joining the ever-growing list: Subway. The company announced today that it is working with PayPal to create new mobile order and checkout capabilities across its 27,000 U.S.