The big winners in the three-month period ending in February in terms of smartphone share globally and in the U.S. were Android and Windows Phone, according to Kantar Worldpanel, with BlackBerry experiencing significant declines in consumer interest and iOS remaining fairly level in most markets. The bad news for BlackBerry is that it saw its smartphone OS share decline even in the U.K., where it launched BB10 and its new hardware at the end of January.