> double-clicking on this 123_456_789 will select all 9 important numbers True, but alas, on iOS I found that a double-tap selected only one of the digit group

> double-clicking on this 123_456_789 will select all 9 important numbers True, but alas, on iOS I found that a double-tap selected only one of the digit groups. In my view the touch interface UX is just as significant - perhaps even more so in recent years - given that the backdrop to many of these identifier format decisions is ensuring nontechnical end-user support, under time pressure, over possibly quite unreliable channels, goes as well as it can. But look on the bright side, at least it didn't try to call the number