New phones such as the Q5 have failed to catch on. Photo: Bloomberg New phones such as the Q5 have failed to catch on. Photo: Bloomberg
New phones such as the Q5 have failed to catch on. Photo: Bloomberg

BlackBerry heads for fourth write-down

New phones such as the Q5 have failed to catch on. Photo: Bloomberg New phones such as the Q5 have failed to catch on. Photo: Bloomberg
New phones such as the Q5 have failed to catch on. Photo: Bloomberg
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