How do I add a + to a series of phone numbers on excel prior to import?
Download Kutools (http://www.extendoffice.com/product/kutools-for-excel.html) – free for either 14 or days, then $ 19 for two years. After install you have an additional menu item in Excel called Kutools. Select the Column you want to add +, Go to Kutools, Select Text Tools, Add Text – fill in the criteria and click ok.