PayPal is finally entering the mobile payment arena. PayPal announced Monday a mobile app deal with Burger King. It missed out on McDonald's, as the king of fast food paired with Apple Pay. The PayPal payment service is expected to rollout early next year to more 13,000 Burger Kings and will be compatible on both iOS and Android devices via the Burger King app. "We will be rolling out later this quarter across the United States to all locations, BK restaurant guests will be able to securely pay with PayPal by simply launching the app and when they select to pay with PayPal they will be prompted with a four digit pin to pay," Hill Ferguson, chief product officer at PayPal, wrote in a post. In addition to the Burger King partnership, PayPal also announced the broader rollout of an option called Pay After Delivery, which lets customers pay for items up to two weeks after the date of purchase. That program lets shoppers inspect a delivered product before they pay for it, provided the item arrives within two weeks. eBay recently announced plans to spin off PayPal into a separate publicly traded company in early 2015, potentially freeing up PayPal to be more aggressive with retail partnerships.