Most Hong Kong mobile numbers start with 9, though numbers starting with 5 and 6 were added in 2000. Photo: May Tse

Hong Kong mobile numbers may have to start with 'unlucky' 4 and 7 as vacant numbers get used up

Inauspicious digits could be pressed into service as city's dwindling supply of numbers is used up

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Most Hong Kong mobile numbers start with 9, though numbers starting with 5 and 6 were added in 2000. Photo: May Tse
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