The move arrives soon after HTC posted its worst revenues for 13 years.
HTC said Chang's resignation is not expected to impact the company's operations since the smartphone brand recently completed an internal business restructuring by appointing five managing directors to supervise its smartphone and artificial virtual operations in Taiwan, the Americas, Europe, North Asia and China.
There's no word yet on who will replace Chang at HTC, so his position's duties will likely fall on CEO Cher Wang's shoulders - not an easy feat.
HTC has confirmed today that Chialin Chang, the President of Smartphone and Connected Devices Business, has left the company effective immediately. "We thank him for his dedication to the Company for the last 6 years and wish him well in his future endeavors".
According to HTC, Chang joined the Taiwanese smartphone brand in April 2012 as chief financial officer after leaving the U.S-based investment bank Goldman Sachs.
HTC has already sold off most of its smartphone design and engineering team to Google for $1.1 billion. However, it remains to be seen how active HTC will be in that sector, now that its talented mobile team is over at Google. He was the CFO of HTC in the years 2013-2017. Some speculate that the HTC U12 might be the company's last flagship, but nothing is confirmed at this point.