POM does not clean up the country code if the country code is provided as a separate attribute. If POM finds non-numeric characters in the country code attribute except the leading single +(plus) or –(minus) sign, POM rejects the contact as per the existing behavior.
However, if the country code is not provided as a separate attribute, but is provided in the phone number attribute and separated from the phone number by the country code separator, POM cleans up the non-numeric characters from the country code that is extracted out of the phone number attribute.