I need to import customer data into ZenDesk Support for ZenDesk Talk. One of the requirements is that the phone number is formatted as +17035551212. However, I have tried all the tricks I know of to get the first character to remain as a + when I save the file as CSV. (I've tried formatting it as General with +0; 0; -0, which works until I save the document and re-open it ... the number then just appears as 17035551212 without the "+".

Please help before I drop kick my 'puter.

Thank you!