Nokia Oyj's North American chief, Chris Weber, was named head of sales in Chief Executive Officer Stephen Elop's biggest management overhaul, taking on the task of winning buyers for the new flagship Lumia phone line. Weber, who like Elop is a Microsoft Corp. veteran, will take over responsibilities now held by Jerri DeVard and Niklas Savander, who are both stepping down, the Espoo, Finland-based company said in a statement today. Timo Toikkanen will succeed Mary McDowell as head of the mobile-phone division, which makes low-end handsets mainly for emerging markets.