Symbian today announced that at the end of November 2007 cumulative Symbian OS phone shipments reached 30 million. It took 10 months to go from 10 million to 20 million phones, but has only taken a further 8 months to reach 30 million. Japan is a mature market so this growth is likely on the back on increased market share (50% to 65% year on year as of June 2007).
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