Apple today officially launched Apple Pay in Brazil thanks to its exclusive partnership with Itaú Unibanco, a Brazillian bank. While Apple Pay is only supported by one bank in Brazil, it is accepted by plenty of retailers in the country like Starbucks, Taco Bell, Track&Field, and more.
This number is bound to increase over time as Apple is known to work behind the scenes in getting more banks and retailers onboard.
Apple Pay is supported by iPhone 6 and higher. Apple Pay on the web is supported on all recent iPads featuring Touch ID including the recently unveiled 6th gen iPad and the iPad mini 3/4. If you own a compatible iPhone or iPad, you should be able to set up Apple Pay on your device from the Wallet app.
Apple has been rapidly expanding Apple Pay to countries outside of the United States for over a year now. Back in October, the mobile payment service expanded to Finland, Denmark, Sweden, and the United Arab Emirates. Other regions which already support Apple Pay include China, Singapore, Hong Kong, Australia, Russia, New Zealand, Taiwan, France, Spain, and more. You can find a list of countries where Apple Pay is supported over here.