Use APKPure App
Get Export Contacts CSV for Gmail old version APK for Android
Esportare i contatti in un file CSV Gmail-friendly.
Do you have contacts in your address book that are not syncronized with Google and you want to? Such as those on your SIM card, phone memory or any social network...
Quickest way to do so is to export those contacts to a CSV file and then import them to Google contacts through Gmail web interface.