I don't know of any utilities but it's only a few steps in Excel to do
it manually.
- Select the column phone numbers
- Edit, replace, Find What=[ , Replace with=
(replacing with nothing)
Do this for space, ], and any other characters in the strings
- Formal cells, Custom +### ### ####
- Select all cells, Copy, paste into Notepad
- Select all Notepad, Copy and paste back into the cells
Assuming you had 10 digits for each phone number that should be it.
You can check by inserting a column after the phone number with a
formula in it like
=IF(LEN(A1)<>13,"Check Number!","")
Voila!
P.S. Of course I trust you are not doing this for any Spamming
purposes. Telephone and Fax spammers have a special part of Hell
reserved where headphones are superglued to your ears and they play
continuous Britney Spears and Crazy Frog ringtones for eternity....