Nokia this morning claimed a minor return to form with an upturn in its phone business, especially smartphones. It shipped a much larger 21.5 million "converged devices," which includes both its smartphones and the Booklet 3G, in the first quarter of the year. The tally is a 57 percent jump from a year ago and is estimated to give it 41 percent of the smartphone market, or a slight recovery from both the fall and from a year ago.