5 8 1 0 / 5 8 2 0 ▁shared ▁the ▁same ▁physical ▁cas ing ▁and ▁keyboard ▁layout ▁as ▁the ▁earlier ▁ 9 5 7 ▁device . ▁ ▁The ▁ 6 0 0 0 ▁series ▁was ▁launched ▁in ▁ 2 0 0 3 ▁with ▁ 6 2 1 0 ▁entering ▁the ▁influ ential ▁Time ▁All ▁Time ▁ 1 0 0 ▁G ad gets ▁list . ▁ ▁First ▁color ▁models ▁( 7 0 0 0 ▁series ) ▁ ▁In ▁ 2 0 0 3 , ▁the ▁mon och rome ▁models ▁were ▁re vised ▁to ▁include ▁a ▁color ▁screen , ▁while ▁retain ing ▁the ▁same ▁form ▁factor ▁and ▁cas ing . ▁Early ▁color ▁models , ▁such ▁as ▁the ▁ 7 2 3 0 , ▁typically ▁used ▁a ▁dim ▁elect rol um ines cent ▁back light , ▁leading ▁to ▁an ▁initial ▁reputation ▁of ▁poor ▁image ▁quality . ▁Later ▁color ▁models , ▁such ▁as ▁the ▁ 7 2 9 0 , ▁typically ▁used ▁a ▁LED ▁back light , ▁yield ing ▁much ▁better ▁screen ▁quality . ▁The ▁color ▁L CD ▁screens ▁used ▁in ▁these ▁series ▁were ▁either ▁reflect ive ▁or ▁trans f lect ive , ▁so ▁these ▁screens ▁yield ed ▁better ▁image ▁quality ▁in ▁direct ▁sun light ▁even ▁with ▁the ▁back light ▁turned ▁off . ▁ ▁Near ly ▁all ▁models ▁in ▁this ▁list ▁were ▁ 1 6   MB ▁models ▁with ▁no ▁Bl uetooth . ▁The ▁only ▁model ▁with ▁ 3 2   MB ▁and ▁Bl uetooth ▁is ▁the ▁ 7 2 9 0 , ▁which ▁was ▁the