BlackBerry CEO John Chen insists that he has put in place much-needed changes that will help turn around the struggling phone maker. “It was important to make swift and impactful changes to ensure that our customers’ investments in BlackBerry’s infrastructure and solutions are secure,” Chen wrote in an op-ed for CNBC that posted on Monday. Chen has made some key changes, most notably outsourcing a chunk of device manufacturing to Foxconn and reorganizing the company around a few key areas, including services for businesses, the BBM messaging product, the handset business and the world of non-phone devices that use the QNX operating system BlackBerry acquired a couple years back. He’s also committed the company to being profitable by fiscal 2016, canceled some planned products and spiked plans for a major customer conference for 2014. However, the bigger challenges remain those that BlackBerry has faced for several years now.