Ford Motor Co., struggling with in-car technology flaws, will base the next-generation Sync system on BlackBerry’s QNX and no longer use Microsoft’s Windows, according to people briefed on the matter. Using QNX will be less expensive than licensing Microsoft technology and will improve the flexibility and speed of the next Sync system, the people, who asked not to be identified because the decision hasn’t been made public, said Feb. 22. Ford has more than 7 million vehicles on the road with Sync using Microsoft voice-activated software to make mobile-phone calls and play music. The switch may help Ford, the second-largest U.S. automaker, address customer complaints about malfunctioning technology systems and touch screens that have hurt it in surveys by J.D. Power & Associates and Consumer Reports.