▁necessity ," ▁Um ▁said . ▁ ▁With ▁the ▁un ve iling ▁of ▁the ▁iPhone ▁ 6 ▁and ▁ 6 ▁Plus ▁at ▁a ▁ke yn ote ▁event ▁on ▁September ▁ 9 , ▁ 2 0 1 4 , ▁Touch ▁ID ▁was ▁expanded ▁from ▁being ▁used ▁to ▁un lock ▁the ▁device ▁and ▁authentic ating ▁App ▁Store ▁purch ases ▁to ▁also ▁authentic ating ▁Apple ▁Pay . ▁The ▁iPhone ▁ 6 S ▁incorpor ates ▁a ▁second - gener ation ▁Touch ▁ID ▁sensor ▁that ▁is ▁up ▁to ▁twice ▁as ▁fast ▁as ▁the ▁first - gener ation ▁sensor ▁found ▁in ▁the ▁ 5 S , ▁ 6 , ▁and ▁SE ▁( 1 st ▁generation ) ▁ph ones . ▁As ▁of ▁April ▁ 2 0 2 0 , ▁the ▁iPhone ▁ 6 S , ▁ 6 S ▁Plus , ▁ 7 , ▁ 7 ▁Plus , ▁ 8 , ▁ 8 ▁Plus , ▁SE ▁( 2 nd ▁generation ) ▁( 2 0 2 0 ), ▁ 2 0 1 6 ▁and ▁ 2 0 1 7 ▁Mac Book ▁Pro , ▁i Pad ▁Pro ▁ 1 0 . 5 ▁and ▁ 1 2 . 9 ▁( second ▁generation ), ▁and ▁ 2 0 1 8 ▁Mac Book ▁Air ▁are ▁the ▁Apple ▁devices ▁which ▁use ▁the ▁second ▁generation ▁sensor . ▁The ▁new ▁Touch ▁ID ▁un lock s ▁almost ▁instantly ▁and ▁pos ed ▁an ▁issue ▁as ▁it ▁un lock s ▁too ▁fast ▁to ▁read ▁notifications ▁on ▁the ▁lock ▁screen . ▁This ▁is ▁rem ed ied ▁with ▁the ▁iOS ▁ 1 0 ▁update ▁in