I am trying to add a list with mobile phone numbers in it.
I have tried these formats:
+11231231234
(123) 123-1234
+1 (123) 123-1234
Each time I get the message: "The data in your file is not in a phone number format." Not only is it in phone number format, these are the phone number formats that Constant Contact recommends (as stated in https://knowledgebase.constantcontact.com/email-digital-marketing/articles/KnowledgeBase/37423-Standard-contact-headings-and-character-limits-for-file-import?lang=en_US).
Any ideas as to what the problem is?
