Use APKPure App
Get Contact Backup & Restore old version APK for Android
Backup / Restore all your contacts from your phone, before / after factory reset
All Phone book fields for android versions are supported.
Export the Universal .vcf (VCard) Format archives, restore it anytime. Even if you did not have this App installed.
Rescue your phone book by just tapping one button
The VCF (VCard) archives can be easily exported and transferred by usb cable, sdcard, google drive etc.