Released in "Australia, Canada, China, France, Germany, Hong Kong, Japan, New Zealand, Puerto Rico, Singapore, the UK, and the United States."
http://www.macrumors.com/2015/09/24/iphone6s-launch-kicks-of...
http://www.macrumors.com/2015/09/24/iphone6s-launch-kicks-of...
[1] http://www.apple.com/pr/library/2015/09/28Apple-Announces-Re...