LG introduced a feature known as ‘Knock Code’ when it took the wraps off its G Pro 2_flagship smartphone last month, which lets users activate the display_by tapping one of up to over 80,000 programmable combinations. The feature has been making an appearance on its smartphone models unveiled so far this year, including the F series and L series. Now LG has announced that the Knock Code feature will be made available on earlier key smartphone models via a firmware update starting in April. Those who have the_LG G2 and G Flex in “specific countries” will be the first to...

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