Android Pay has recently been updated to version 1.13, and while this didn't add many new changes to the payment app's interface or otherwise, an APK teardown reveals more about the future capabilities of Android Pay. The mobile payment app will (at some time in the future) allow users to add their PayPal cards and the ability to support Visa Checkout. Thanks to a deal previously established between PayPal and Discover, places where Discover is normally accepted would enable these terminals with PayPal support. A similar deal returned the favor which allows PayPal access to Discover's...
Source: http://www.gsmarena.com/android_pay_to_support_paypal_cards_and_visa_checkout_v113_apk_teardown_reveals-news-22893.php