The format of the external file needs to be in CSV (comma seperated values) format as show below
“923330000000”,”First Name”,”Last name”,”email@domain.com“,”address”, “custome value 1″,”custome value 3″,”custome value 3″,”comments”
“923331111111”,”First Name”,”Last Name”,”other@domain.com“,”address”, “custome value 1″,”custome value 3″,”custome value 3″,”comments”
The first fields (Telephone numbers) is mandatory and other fields are optional, which means you can prepare a contact list file with only telephone numbers as shown below
“923300000000”
“923331111111”
You can prepare a contact list file using any text editor or preparing it in any spreadsheet-like Microsoft Excel and then importing and save it in CSV format
The file extension needs to be CSV like myfile.csv