Xiaomi to launch online store in the US this year, though it won't sell phones (yet)6
According to The Verge, Hugo Barra said that issues like hardware certification, infrastructure, and software testing are making it hard for Xiaomi to launch smartphones and tablets in the US - that's why this isn't in its current roadmap. Thus, if you're planning to buy, say, a Xiaomi Mi Note or Mi Note Pro this year, you'll have to place your order via third-party resellers.
In 2014, Xiaomi sold more than 61 million smartphones (mainly in Asia), as well as over 1 million Mi Bands. The company is now one of the world's top five smartphone vendors - an impressive achievement, considering the fact that it started selling handsets less than 4 years ago.
source: The Verge