Entering the Guinness Book of World Records is the latest in a series of milestones for the 5-year-old company.
Late last year, Xiaomi, living up its to repute as a "disruptive force", leapfrogged Lenovo and LG to become the world's third largest smartphone maker in terms of shipments behind Samsung and Apple, according to IDC.
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The company sold over 61 million smartphones in 2014, up from 18.7 million in 2013, and expects to sell 100 million handsets this year, according to media reports.
Watching its meteoric rise, investors have been flocking to put money into Xiaomi. It raised more than $1 billion in the latest round of funding in December, giving the company a $45 billion valuation – bigger than Uber, Netflix and Twitter.
Xiaomi's success has been driven by the Chinese market where it sells over 90 percent of its smartphones and is the number one player.
However, the company has been actively working on expanding its foothold outside of its home market, launching in key emerging markets including India and Indonesia in the past year.
-- CNBC's Arjun Kharpal contributed to this report