In Address Book you are asked to provide the international country format, if the country format is missing.
This means that if a number does not start with "00" or "+", we automatically change the format to the country of your choice.
An example of an upload with fallback international format set on UK (+44).
Number is not properly read (i.e. "4,478E10")
International prefix is missing ("+" or "00") Step 1 Set your excel file from A -> Z
Step 2 Add column for the right values
Step 3 Upload you Address Book and check country format
After uploading the excel file, go to the Address Book and check whether the phone numbers are properly uploaded.
Address Book upload:
Example Import File: Download Example File