Hi, are the samples "before" or "after", i.e do you want to add another + sign in front or are you showing the result?

In any case, the data is text, so there's not much you can do to change that with formatting.

if you have a "real" number, like

12124435546

then you can use a custom format like

"+"0-000-000-0000

to get

+1-212-443-5546

hth