I'm trying to format IMEI numbers in Excel according to RIM (Blackberry) conventions: XXXXXX.XX.XXXXXX.X
I enter them in excel without any periods and use the "special format" cell properties so it displays right. This works kind of: ######-##-######-#
However, when I replace the dashes with periods (######.##.######.#
) Excel automatically changes it to ###.###.###.###.###
, 5 groups of 3. It does this too when I prepend it with a space.
Does anyone know how to disable this behaviour or a workaround?