Softbank has reported a fiscal third quarter net profit jump of 41%, thanks in part to strong sales of the iPhone and related services, according to a Wall Street Journal report. Japan’s third-largest carrier by subscribers, Softbank said net profit for the December quarter was 24.1 billion yen (roughly $265.9 million), up from 17.1 billion yen in the year-ago quarter. “When we launched the iPhone [in the summer of 2008], some people said…