Nokia phones using the S30+ OS do not allow multiple phone numbers per contact.
When importing contacts from a .vcf file, only the first phone
number of a contact is kept. This script add extra vCard entries to
the file with the same name + [2|3|4...] so the phone takes it into
account.
Add a Contacts.vcf to the working dir and:
$ pipenv install
$ pipenv shell
$ python3 main.py > new_contacts.vcf
$ python3 main.py > backup.dat # for Nokia 130