He also lifted his iPhone unit estimate for the March quarter to 15 million unit from 13.1 million, reflecting his view that the Verizon iPhone will start shipping in early February.

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He now sees March quarter iPhone unit sales of 34 million, down from 35 million, and below the Street at 37 million.

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It formed a Security Business Unit in March last year, in addition to its Trustworthy Computing initiative.

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